Explanation:

National Commission for Backward Classes (NCBC):

1. National Commission for Backward Classes lies under the jurisdiction of Ministry of Social Justice and Empowerment.Hence option 1 is incorrect.
2. National Commission for Backward Classes (NCBC) is a constitutional body under Ministry of Social Justice and Empowerment. It is proposed as a constitutional body under Article 338B as per the Constitutional (123rd Amendment) Bill, 2018 and 102 constitutional amendment.
3. The Commission considers inclusions in and exclusions from the lists of communities notified as backward for the purpose of job reservations and tenders the needful advice to the Central Government.
4. National Commission for Backward Classes has been empowered to look into the grievances of persons of Other Backward Classes