This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General physiology, Subject name: Physiology
Major neurotransmitter released at end organ effectors of the sympathetic division of the autonomic nervous system 
Select and explain. 
A. Adrenaline, B. Noradrenalin, C. Dopamine, D. Acetylcholine
A: Adrenaline
Answer: A: Adrenaline 
Explanation: In the parasympathetic division, neurons are cholinergic (that is, acetylcholine is the primary neurotransmitter). In sympathetic division, neurons are mostly adrenergic (that is, epinephrine and norepinephrine function as the primary neurotransmitters). Ref guyton and hall textbook of medical physiology 12/e pg 83