The Sylhet Referendum was held in?

 (a) 1947

(b) 1948

(c) 1949

(d) 1950

The Sylhet Referendum was held in July 1947 (specifically on July 6 and 7, 1947) in the Sylhet district of the Assam Province of British India.

• Purpose: To decide whether the district would remain part of the Indian province of Assam or join East Bengal in the newly created Dominion of Pakistan. 
Result: The majority voted in favor of joining Pakistan, leading to most of Sylhet becoming part of East Pakistan (now Bangladesh), while the Karimganj subdivision remained in India.