Arup Chattopadhyay was was awarded top grade by whom for performing with leading artists like Shahid Parvez?
Arup Chattopadhyay:  He was awarded the top-grade by All India Radio and Television (All India Radio and Doordarshan). Shahid Parvez: Ustad Shahid Parvez Khan (born 14 October 1958) is a sitar player of Hindustani classical music.
All India Radio and Television