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
Otto Loewi is famous for discovery of 
Select and explain. 
A. Succinyl choline, B. Acetyl choline, C. Adrenaline, D. Noradrenaline
B: Acetyl choline
Answer: B: Acetyl choline 
Explanation: Otto Loewi is famous for discovery of acetylcholine for which he received a Nobel price. so the option 2.(Reference: www.nobelprize.org)