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(A) The correct answer is $A$. When individuals move from plains to high-altitude regions like Rohtang Pass,they initially experience altitude sicknes

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have more $RBCs$ and their haemoglobin has a lower binding affinity to $O_2$

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(A) The correct answer is $A$. When individuals move from plains to high-altitude regions like Rohtang Pass,they initially experience altitude sickness due to low atmospheric pressure and reduced oxygen availability. However,after staying for about six months,the body undergoes physiological acclimatization. This process involves: $1$. Increasing the production of red blood cells $(RBCs)$ to enhance oxygen-carrying capacity. $2$. Decreasing the binding affinity of haemoglobin to $O_2$ (shifting the oxygen dissociation curve to the right),which facilitates the release of oxygen into the tissues. $3$. Increasing the breathing rate to compensate for low oxygen levels.

People who have migrated from the plains to an area adjoining Rohtang Pass about six months back:

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People who have migrated from the plains to an area near Rohtang Pass six months ago will exhibit which of the following characteristics?

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