The correct option is A 1 only
Follicle stimulating hormone (FSH) is one of the gonadotropins secreted by anterior pituitary; FSH promote spermatogenesis in seminiferous tubules of male and follicle development in females. Pair 1 is correctly matched. The cells of anterior pituitary that secrete STH (somatotropin hormones) while thyroxine and triiodothyronine are thyroid hormones. Thus, pair 2 is mismatched. Parathyroid gland secretes parathyroid hormone that reduces the blood phosphate level while increases the blood calcium level. Thyroxin is thyroid hormone. Pair 3 is mismatched. Correct answer is A.