Define Endocrine glands.

Endocrine glands are ductless glands that secrete hormones directly into the bloodstream.

Assertion (A): Oversecretion of insulin causes diabetes mellitus.
Reason (R): Insulin converts glycogen to glucose which increases blood sugar.
Both A and R are true.
Both A and R are false.
A is true and R is false.
A is false and R is true.

Column A	Column B
Cretinism	Pituitary Gland
Diabetes Mellitus	Abnormal development of infant
Increased metabolic rate	Oversecretion of thyroxine
Simple goitre	Insufficient iodine in food
Growth hormone	Insufficient insulin in blood