The correct option is B Mahatma Gandhi
The Constituent Assembly constituted on November 1946 under Cabinet Mission Plan. It has a total strength of 389 members and appointed several Committees for dealing with different tasks of Constitution making. Vallabh Bhai Patel was chairman of Provincial Constitution Committee, J.B Kriplani headed Fundamental Rights Sub-Committee and Dr. K.M Munshi was chairman of Order of Business Committee.