Privately run FM channels in India are not permitted to broadcast:

The correct answer is Option (1) → political news bulletins

Option (1) political news bulletins — Correct. Privately run FM channels are not permitted to broadcast any political news bulletins. To keep their listeners, many of them turn to particular kinds of popular music instead.

Option (2) sponsored music programmes — Incorrect. Music is the main fare of private FM channels. Many of them specialise in particular kinds of popular music to retain their audiences, so music shows are fully allowed.

Option (3) commercial advertisements — Incorrect. Private FM stations are commercial businesses, and many belong to big media houses. Advertisements are their income, so they are a normal part of what they broadcast.

Option (4) regional language programmes — Incorrect. Programmes in regional languages are allowed. Radio in India reaches listeners in many languages and dialects, and the demand for local content keeps growing.