Which two of the following changes (I-IV) result when the inhabitants of the plains move to higher latitudes (3500 m or more)?
I. Increase in the size of red blood cells
II. Increased production of red blood cells
III. increased breathing rate
IV. increased number of thrombocytes
1
II and III
2
III and IV
3
I and IV
4
I and II
5
Question Not Attempted