Diabetes mellitus takes place only when

Options

A. `alpha` -cells of pancreas are in excess
B. `beta` -cells of pancreas are in excess
C. `alpha` -cells of pancreas are in hypo
D. `beta` -cells of pancreas are in hypo

Answer

D

Explanation

`beta` -cells of pancreas secrete insulin which helps to lower down blood glucose level. In diabetes mellitus glucose level in blood is above normal (180 mg/dL) due to deficiency of insulin.