Correct Answer: (b) Article 338
Solution:Article 338 of the Constitution originally provided for the establishment of a Special Officer for Scheduled Tribes and Scheduled Castes (SCs and STs) to look into any issues pertaining to constitutional safeguards for the SCs and STs and to report to the President on their workings. Later, the 65 Constitutional Amendment Act of 1990, provided for the establishment of a high level multi-member National Commission for SCs and STs in the place of a single Special Officer for SCs and STs. Again, the 89 Constitutional Amendment Act of 2003, bifurcated the combined National Commission for SCs and STs into two separate bodies, namely, the National Commission for Scheduled Castes (under Article 338) and the National Commission for Scheduled Tribes (under Article 338-A).