Calcitonin secretion is stimulated by

Somatostatin from hypothalamus gland

Relaxin is secreted by which endocrine gland?

Function of relaxin hormone is

'Cretinism' is due to less secretion of

Pheromones are also called

$I.$ ectohormone $II.$ sex attractants $III.$ semichemicals

The correct option is