1(iv)
The hormone that affects urination is:
- (a)Adrenaline
- (b)Vasopressin
- (c)Oestrogen
- (d)Thyroxine
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Vasopressin
Reason — Vasopressin is produced by the posterior pituitary gland. Also known as ADH (Anti-diurectic hormone), it plays role in reabsorption of water in kidneys.