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
Acid secretion in stomach is increased in all of the following conditions, except: 
Select and explain. 
A. Decreased Histamine, B. Decreased Acetyl choline, C. Food in stomach, D. Decreased Gastrin
C: Food in stomach
Answer: C: Food in stomach 
Explanation: Food in stomach