Explanation:

- Ustad Bundu Khan was a renowned sarangi player from India. He contributed greatly to popularizing this instrument.

- Santosh Mishra is also known for his expertise in playing the sarangi.

- The sarangi is a traditional Indian string instrument known for its rich, emotive sound. It’s predominantly used in Hindustani classical music.

- Option 3: Sarangi is the correct answer for both Ustad Bundu Khan and Santosh Mishra.

- The sitar, shehnai, and sarod are other classical Indian instruments, each with its own unique players and style.

- The sitar is a plucked string instrument associated with Ravi Shankar.

- The shehnai is a wind instrument, often played by Bismillah Khan.

- The sarod is another string instrument famously played by Amjad Ali Khan.

Correct Answer: Option 3 - Sarangi