It has been an unbroken convention for decades now, to appoint the senior-most judge of the supreme court as the CJI.

Based on this passage, who is appointed the chief justice of india? Let's think fast. Stream of consciousness:
The relevant information to answer the above question is: It has been an unbroken convention for decades now, to appoint the senior-most judge of the supreme court as the CJI. So the final answer is the senior-most judge of the supreme court.