Calcitonin (CT): 1)is Generally Regarded as One of Three Hormones Responsible for Responsible

Calcitonin (CT) :
1) is generally regarded as one of three hormones responsible for the control of calcium and phosphorus homeostasis.
2) causes a prompt increase in serum calcium and phosphorus concentrations following intravenous administration.
3) is produced by the parafollicular C cells of the thyroid gland.
4) is rapidly excreted, with a half-life of 10 minutes after intravenous administration.

A) 1, 2, 3, 4
B) 1, 2, 3
C) 1, 2, 4
D) 1, 3, 4