The National Commission for Scheduled Tribes (NCST) is a constitutional body set up under Article 338A of the Indian Constitution. 
 Step-by-step explanation: 
 - Article 338A states that the President of India will appoint the Chairperson, Vice-Chairperson, and other members of this commission. 
 - This body works to safeguard the rights of Scheduled Tribes and monitor various schemes and laws concerning them. 
 Option Analysis: 
 - (A) Chief Justice of India: Has no role in such appointments. 
 - (B) Vice-President of India: Not responsible for appointments to constitutional commissions. 
 - (C) President of India: Correct. Has constitutional authority to make the appointment. 
 - (D) Prime Minister: May be consulted, but final appointment is by the President.