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

  1. A
    Have the usual RBC count but their haemoglobin has very high binding affinity of
  2. B
    Have more RBCs and their haemoglobin has a lower binding affinity of
  3. C
    Are not physically fit to play games like football
  4. D
    Suffer from altitude sickness with symptoms like nausea, fatigue, etc.

Solution & Step-by-step Explanation

At high altitudes (low pressure), the body compensates by increasing RBC production (polycythemia) and increasing breathing rate. Furthermore, the binding affinity of hemoglobin for oxygen decreases, which facilitates easier release of oxygen to the tissues. After six months, the body would have fully acclimatized, so they would not suffer from acute altitude sickness.

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People who have migrated from the plains to an area adjoining Rohtang Pass about six months back:
A
Have the usual RBC count but their haemoglobin has very high binding affinity of
B
Have more RBCs and their haemoglobin has a lower binding affinity of
C
Are not physically fit to play games like football
D
Suffer from altitude sickness with symptoms like nausea, fatigue, etc.

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Human PhysiologyRespirationAltitude Sickness

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