Who among the following was the President of the Constituent Assembly of India?

Who among the following was the President of the Constituent Assembly of India? [SSC Combined Matric Level Exam 30/07/2006, Shift I]

          a) Dr. Rajendra Prasad

          b) Jawaharlal Nehru

          c) M.A. Jinnah

          d) Lal Bahadur Shastri