What is the full form of RKSK?

QiKgmCbX2istVaYjGvqpX7
E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart C (pp 404-604 of 604) pp. 135-137, 136-138, 151-153
Practise the full MP CHO -2019 (Shift-1)
Attempt every question from this paper in a timed mock, then review the full solution for each one.