This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Physiology
Which of the following is an amino neurotransmitter 
Select and explain. 
A. Acetylcholine, B. GABA, C. Lignocaine, D. Epinephrine
B: GABA
Answer: B: GABA 
Explanation: None