Question: What category of music instrument is Vidushi Shashikala Dani the only All India Radio an exponent of?
Sentence (from "Shashikala Dani"): She is one of the few artists and presently the only All India Radio graded female exponent of a unique Indian instrument, Jaltarang (Kannada: ಜಲ ತರಂಗ, ""  |Hindi: जल तरंग, ""  ).
Relevant evidence: Yes