For the discharge of its functions efficiently, SEBI has been vested with the following powers:
1. To approve by-laws of stock exchanges.
2. To direct the stock exchanges to amend their by-laws.
3. Inspect the books of accounts and call for periodical returns from recognized stock exchanges.
4. Inspect the books of accounts of financial intermediaries.

A. 1, 2 and 3

B. 1, 3 and 4

C. 2, 3 and 4

D. All of the above

Answer: Option D