Q.Name the two major stock exchanges of India and state their respective benchmark indices.

India's two dominant nationwide exchanges each publish their own headline index, tracking a basket of large listed companies. …

India's two major, nationwide stock exchanges are:

1. Bombay Stock Exchange (BSE) — established in 1875, Asia's oldest stock exchange, headquartered in Mumbai. Its benchmark index is the S&P BSE SENSEX, computed from 30 large, financially sound and actively traded companies drawn from key sectors of the economy.
2. National Stock Exchange of India (NSE) — incorporated in 1992 and the pioneer of fully electronic, screen-based trading across the country. Its benchmark index is the NIFTY 50, computed from 50 large, liquid companies across major sectors. …

Mixing up which exchange owns which index (Sensex belongs to BSE, Nifty to NSE), or forgetting the number of companies each benc …