The bore hole latrine was introduced in India by?

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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. 214-216
E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart B (pp 233-449 of 464) p. 74-76
Practise the full JODHPUR AIIMS SNO-2018
Attempt every question from this paper in a timed mock, then review the full solution for each one.