Q.A Public Company is related with –

A Public Company (company-law sense) is a private-sector enterprise — option (A) — not to be confused with "public sector" (government-owned) enterprise.

This question tests a common point of confusion in the Forms of Business Organisation / Private, Public and Global Enterprises chapters: the word "public" is used in two very different senses.

• A Public Company, under the Companies Act, is simply a company that is not a private company — it has no restriction on the maximum number of members, its shares are freely transferable, and (if listed) the public can buy and sell its shares on a stock exchange. Ownership and management here still rest with private individuals/promoters/shareholders — it belongs to the private sector.
• A Public Sector Enterprise, by contrast, is one in which the government (Central, State, or both) owns the majority of the capital and controls management — organised as a Departmental Undertaking, Statutory/Public Corporation, or Government Company. …