Sharp blades and needle to be discarded in which of following?

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E6 Parks TextBook of Preventive & Social Medicine part 2 — Subpart B (pp 233-449 of 464) p. 109-111
E6 Nursing Fundamentals Taylor pp. 181-183, 180-182
Practise the full AIIMS Delhi NO- 2019
Attempt every question from this paper in a timed mock, then review the full solution for each one.