When the office of the Chief Justice of India is vacant or when the chief justice is by reason of absence or otherwise unable to perform the duties of his office,Who shall have the authority to appoint acting chief justice as per Article 126 the constitution of India?

A

The Registrar General of supreme Court

B

The President of India

C

Automatic appointment of the Senior most Judge of the supreme Court as acting chief Justice

D

The Attorney General of India