Ustad Asad Ali Khan was one of the masters of the ___________.

The correct answer is rudra veena.

Ustad Asad Ali Khan (1937–2011) was a distinguished Indian classical musician renowned as one of the last great masters of the rudra veena, a traditional plucked string instrument used in Hindustani classical music.

Key Details:

• Tradition: He represented the Khandarvani style (bani) of Dhrupad, preserving an ancient musical lineage.
• Contributions: He actively performed in India and globally to keep the tradition of the rudra veena alive.
• Recognitions: He was honored with prestigious awards including the Sangeet Natak Akademi Award in 1977 and the Padma Bhushan in 2008.