Pandit Shiv Kumar Sharma, an Indian musician and composer was the foremost exponent of the ________.

Santoor

The correct answer is Option (2) → Santoor

Pandit Shivkumar Sharma (13 January 1938 – 10 May 2022) was an Indian classical musician and santoor player who is credited with adapting the santoor for Indian classical music. As a music composer, he collaborated with Indian flautist Hariprasad Chaurasia  under the collaborative name Shiv-Hari and composed music for such hit Indian films.