Q.“The quaternary sector along with the tertiary sector has replaced most of the primary and secondary employment.” Support the statement.

The Golden Quadrilateral is India’s most ambitious highway network, a 5,846 km project that links the four major metropolitan cities — Delhi, Mumbai, Chennai, and Kolkata — forming a rough quadrilateral shape on the map. The idea was to create a high-speed road corridor that would boost economic integration, trade, and travel across the country. Understanding the clockwise order from Delhi is not just about memorising a sequence; it is about visualising the geography of India.

Imagine you are standing in Delhi, the capital in the north. If you move clockwise — that is, turning to your right and following the direction of a clock’s hands — you would first head eastward. The eastern leg from Delhi takes you to Kolkata, which lies on the eastern coast of India, near the Bay of Bengal. From Kolkata, continuing clockwise, you would travel southward along the eastern coast to Chennai, on the southeastern shore of the Bay of Bengal. Then, from Chennai, the route swings westward across the southern part of the country to Mumbai, on the western coast of the Arabian Sea. Finally, from Mumbai, the highway heads northward back to Delhi, completing the loop.

The question tests your understanding of the historical evolution of Indian towns — not just their founding dates, but the broader phases of urban development they represent. Each of these four towns belongs to a distinct era: ancient temple town, planned princely capital, modern industrial city, and post-independence administrative city.

Let’s place them in order.

1. Madurai (oldest) — An ancient city on the banks of the Vaigai, Madurai has been continuously inhabited for over two millennia. It was a major centre of the Pandya kingdom and is famous for the Meenakshi Temple, which dates back to the early centuries CE. This makes it the oldest among the four.

2. Jaipur — Founded in 1727 by Maharaja Sawai Jai Singh II, Jaipur is a planned city built according to Vastu Shastra and the principles of ancient Indian architecture. It belongs to the early modern period, well after Madurai but before the colonial industrial era.

3. Jamshedpur — Established in 1907 by Jamsetji Tata, Jamshedpur is India’s first planned industrial city. It was built around the steel plant and represents the modern industrial phase of urbanisation in India, coming after the princely states but before the post-independence planned cities. …

The statement points to a fundamental feature of economic development: as regions urbanise, employment shifts from agriculture (primary sector) to services (tertiary sector). Understanding why workers concentrate in "other services" in cities requires recognising both the demand side (what urbanisation creates) and the supply side (where workers come from).

Why this shift happens:

Urbanisation and industrialisation are twin processes. Cities grow around factories, offices, transport hubs and markets. These economic activities generate enormous demand for supporting services—retail, transport, healthcare, education, hospitality, domestic work, repair services, banking, administration. The more urbanised an area, the higher the proportion of workers in this tertiary "other services" category.

Historically, every industrialising economy has seen this pattern: workers leave subsistence farming and move into manufacturing (secondary) and especially services (tertiary). India's own trajectory since the 1980s shows exactly this—agriculture's share of employment has fallen while services have absorbed the largest share of the workforce, even more than manufacturing.

Now let us evaluate each statement:

1. Statement I: "Large scale urbanisation and industrialisation require more workers."

   Urbanisation creates cities; industrialisation creates factories and firms. Both generate jobs not just in production but in the vast web of services that support urban life—construction workers, shopkeepers, drivers, cleaners, clerks, security guards. This is directly consistent with the observation that service-sector employment is high in urbanised areas. Correct.

2. Statement II: "Historically, it is a sectoral shift in the economy of the country."

   The movement of workers from agriculture (primary) to industry (secondary) and services (tertiary) is the classic structural transformation documented in every developing economy. India's workforce distribution has shifted markedly over decades: agriculture once employed over 70% of workers; today it is below 50%, with services employing the largest share. This is a well-established historical trend. Correct.

3. Statement III: "Percentage of female workers is relatively high in secondary sector." …

After independence, India’s urban landscape underwent significant change. The pressure on major metropolitan cities — Mumbai, Kolkata, Chennai, and Delhi — grew rapidly as people migrated from rural areas in search of work and better living conditions. To ease this congestion, planned satellite towns were developed around these large cities. Satellite towns are smaller, self-contained urban centres that are physically separate from the main city but functionally linked to it. They are designed to absorb population and economic activity, reducing the strain on the core metropolis.

Examples of such satellite towns include Ghaziabad, Faridabad, and Gurugram around Delhi; Navi Mumbai and Thane around Mumbai; and Salt Lake City around Kolkata. These towns grew after independence as part of deliberate planning efforts. Statement I is therefore correct: old towns around metropolitan cities did develop as satellite towns in the post-independence period. …