डॉ. राजेंद्र प्रसाद को किस तिथि को संविधान सभा का स्थायी अध्यक्ष चुना गया था?

Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): The Constituent Assembly of India was presided over by Dr. Rajendra Prasad as its permanent President. Reason (R): Dr. B.R. Ambedkar was the Chairman of the Drafting Committee of the Constituent Assembly. In the light of the above statements, choose the most appropriate answer:

Dr. Sachchidananda Sinha presided as the interim President during the inaugural meeting of the: