- Maharatna Example: Oil and Natural Gas Corporation (ONGC) is a Maharatna public sector company in India. This status allows the company to make independent investment decisions up to ₹5,000 crore without prior approval from the government.
- Miniratna Example: Bharat Sanchar Nigam Limited (BSNL) is a Miniratna company in India. It has been granted greater operational autonomy but has limits on the capital expenditure it can undertake without government approval.
A compound (A) with molecular formula $C_4H_9I$ which is a primary alkyl halide, reacts with alcoholic KOH to give compound (B). Compound (B) reacts with HI to give (C) which is an isomer of (A). When (A) reacts with Na metal in the presence of dry ether, it gives a compound (D), C8H18, which is different from the compound formed when n-butyl iodide reacts with sodium. Write the structures of A, (B), (C) and (D) when (A) reacts with alcoholic KOH.