Explanation:

- Option 1: Sarangi

- The sarangi is a traditional Indian string instrument.

- Both Shakoor Khan and Pandit Ram Narayan are renowned for playing the sarangi.

- Shakoor Khan was an acclaimed sarangi player, and Pandit Ram Narayan is a celebrated sarangi maestro.

- Option 2: Shehnai

- The shehnai is a wind instrument often used in Indian classical music and festive occasions.

- Famous personalities associated with the shehnai include Ustad Bismillah Khan.

- Shakoor Khan and Pandit Ram Narayan are not known for playing the shehnai.

- Option 3: Guitar

- The guitar is a widely known string instrument used in many music genres globally.

- It is not traditionally associated with either Shakoor Khan or Pandit Ram Narayan.

- Option 4: Veena

- The veena is a classical string instrument from the Indian subcontinent.

- Neither Shakoor Khan nor Pandit Ram Narayan is known for playing the veena.

The correct answer is Option 1: Sarangi.