Correct option is (2) C and D only
A. maintenance of water and electrolyte balance is function of thyroid hormone.
B. Regulation of basal metabolic rate is function of thyroid hormone.
C. Sleep-wake cycle is maintain by melotonine hormone of pineal gland.
D. Thymus plays major role in development of immune-system.
E. Thyroid hormone supports the process of R.B.Cs formation.