People who live at high altitudes have rosy cheeks because- – McqOptions

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1.	People who live at high altitudes have rosy cheeks because-
A.	Haemoglobin has an increased binding affinity for oxygen
B.	RBCs and haemoglobin concentration becomes considerably above the average in response to lowered oxygen pressure
C.	Rate of capillary circulation increases in the skin
D.	All the above
Answer» C. Rate of capillary circulation increases in the skin

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