The Kothari Commission (1976) is well-known for recommending the three-stage structure of the Civil Services Examination: Preliminary, Main (written and interview). Thus, A-4 is a correct and prominent association. The other pairings (B-2, C-1, D-3) presented in Option B are less conventionally associated with these committees based on their primary recommendations, and B-2 (Satish Chandra - Entrance after Class XII) is particularly questionable as a recommendation of the Satish Chandra Committee.