Which two of the following changes (a to d) usually tend to…

Biology Breathing and Exchange of Gases Statement Based Questions Single Correct MCQ

Published on: August 13, 2026

Which two of the following changes (a to d) usually tend to occur in plain dwellers when they move to higher altitudes (3500 m or more)

(i) Increase in red blood cell size (ii) Increase in red blood cell production

(iii) Increase in breathing rate (iv) Increase in thrombocyte count

Both (iii) and (iv)

Both (i) and (iv)

Both (iii) and (i)

Both (ii) and (iii)

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