The Three Naturally Occurring Catecholamines in the Body Are
A) $\gamma$

The three naturally occurring catecholamines in the body are

A) serotonin,acetylcholine,and phenylethylamine.
B) $\gamma$ -aminobutyric acid,melatonin,and oxytocin.
C) enkephalin,histamine,and bradykinin.
D) dopamine,norepinephrine,and epinephrine.