Correct Answer: Nadaswaram

Solution : The correct answer is Nadaswaram

Neeruswamy Pillai and Rajarathnam Pillai are renowned figures in the field of Nadaswaram, a traditional South Indian classical musical instrument. Rajarathnam Pillai, in particular, earned recognition as Nadaswara Chakravarthi, meaning Emperor of Nagaswaram. He garnered widespread popularity and respect while not formally bestowed with official or academic titles. Rajarathnam Pillai is credited with advocating for the acknowledgement of Nadaswaram and Thavil players as independent musicians, contributing significantly to their recognition within the musical community.