# Enzyme deficient in diabetes mellitus is: (TNPSC-99)
a) Glucokinase
b) Hexokinase
c) Phosphorylase
d) Pyrophosphate dehydrogenase
# Which of the following neoplasms is primary in the adrenal medulla? (APPSC-99)
a) Pheochromocytoma
b) Eosinophilic adenoma
c) Arrhenoblastoma
d) None of the above