George Harrison and Ravi Shankar held a press conference in New York to announce The Concert for Bangladesh on this day in 1971.

At the time he agreed to spearhead the concert, Harrison was in the middle of producing an album for a British band. Although he had to drop out of the project, he made them part of his backing group for the show? Who were they?
a) Free
b) Mungo Jerry
c) T. Rex
d) Badfinger