Pandit Ravi Shankar, founder of National Orchestra of India, was a __________ player.

The correct answer is Sitar.

Step-by-Step Explanation:

1. Identify the Subject: The question asks about Pandit Ravi Shankar, a legendary Indian musician, composer, and the founder of the National Orchestra of India.
2. Analyze his Musical Contributions: Pandit Ravi Shankar (1920–2012) was one of the most famous exponents of the sitar in the second half of the 20th century and became a global ambassador for Indian classical music.
3. Match with the Options: Among the options provided (Sitar, Sarangi, Sarod, Flute), Pandit Ravi Shankar is universally renowned for playing the sitar. Therefore, the correct option is "Sitar".