According to the Census of 2011 the sex ratio in India is

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E6 Comprehensive Textbook of Community Health Nursing for BSc Nursing Students Part 2 — Subpart B (pp 276-535 of 550) p. 7-9
E6 Parks TextBook of Preventive & Social Medicine part 1 — Subpart C (pp 404-604 of 604) p. 177-179
Practise the full UPPSC 2017
Attempt every question from this paper in a timed mock, then review the full solution for each one.