Assertion (A) and Reason (R) follow. Select the right choice:
Assertion (A): Population explosion happens when death rates drop sharply while birth rates stay elevated. Reason (R): Changes in societal reproductive patterns occur immediately with healthcare advancements.

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Accepted Answer

1. **Assertion (A) true:** If death rate $d$ falls fast while birth rate $b$ stays high, net growth $r= b-d$ becomes large. This causes a population boom.

2. **Reason (R) false:** Social and reproductive changes (like smaller families) take time. They need education, urbanization, and economic shifts, not just health care.

3. **Link:** Because R is not true, it cannot explain A.

FINAL_ANSWER: c

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