The correct option is B Sardar Vallabhbhai Patel
Explanation:
The historical Karachi Session of Congress in 1931 was presided by Sardar Vallabhbhai Patel. The Karachi session is memorable for a resolution on Fundamental Rights and the National Economic Programme. The resolution guaranteed basic civil and political rights to the people. It provided for the nationalization of key industries and transport, better conditions for the workers, agrarian reform, and free and compulsory primary education, it also assured that “the culture, language and script of the minorities and of the different linguistic areas shall be protected.