Which health education method is used by visiting a blood bank during community postings?

Q-jiDR3srxY3qQlymrFk_z
E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart B (pp 233-449 of 464) p. 182-184
E6 Comprehensive Textbook of Community Health NursingShyamala D part 1 (pp 26-389 of 389) p. 261-263
Practise the full AIIMS Manglagiri NO - 2019
Attempt every question from this paper in a timed mock, then review the full solution for each one.