KCET · BIOLOGY · STD 12 - 3. Reproductive Health

Which one of the following causes population explosion?

A Decrease in infant mortality rate and increase in death rate.
B Decrease in death rate, maternal mortality rate and infant mortality rate.
C Decrease in infant mortality rate and decrease in the number of people in reproductive age.
D Decrease in death rate and increase in maternal mortality rate.

Verified Solution

Answer & Solution

Correct Answer

(B) Decrease in death rate, maternal mortality rate and infant mortality rate.

Step-by-step Solution

Detailed explanation

(B) Decrease in death rate, maternal mortality rate and infant mortality rate.,
Decrease in death rate, maternal mortality rate and infant mortality rate all causes population explosion.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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