Which of the following statement/s is/are incorrect ? (a) B.N. Rau was advisor of the Constituent Assembly. (b) B.N. Rau prepared draft Constitution in October, 1947. (c) A draft Constitution prepared by B.N. Rau contained 310 Articles and 8 Schedules. (d) A draft Constitution prepared by B.N. Rau contained 243 Articles and 13 Schedules.