Which two of the following changes ( a- d) usually tend to occur in plain dwellers when they move to higher altitudes ( 3500 m or more) (a) Increase in red blood cell size. (b) Increase in red blood cell production. (c) Increase in breathing rate .(d) Increase in thrombocyte count

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Saurabh

Saurabh

anyone have any solutions

Sanket

Sanket

please give any soltion

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