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

1. Have more RBCs and their haemoglobin has a lower binding affinity to 02
2. Are not physically fit to play games like football
3. Suffer from altitude sickness with symptoms like nausea, fatigue, etc.
4. have the usual RBC count but their haemoglobin has a very binding affinity to 02

 67%
From NCERT
AIPMT - 2012
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NEET 2026 - Target Batch - Vital
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NEET 2026 - Target Batch - Vital