People who have migrated from the planes to an area adjoining Rohtang pass about six months back

Options

A. have more RBCs and their haemoglobin has a lower binding affinity to `O_(2)`
B. are not [hyusically fit to play games like footballl
C. suffer form altitude suckness with symptoms like nausea fatigue etc.
D. lhave the usual RBC count but their haemoglobin has very high binding affinity to `CO_(2)`

Answer

A

Explanation

As a person moves up a hill the `pO_(2)` and total atmospheric pressure decreases.Decrease in 1`PO_(2)` due to the increasing altitude, stimulates the juxtaglomeruclar cells of kidney to secreate erythropotiin hormone which increases the number of RBCs (polycthemis) to compensate the supply of