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
Maximum contraction of gall bladder is seen with: 
Select and explain. 
A. CCK, B. Secretin, C. Gastrin, D. Enterogastrone
A: CCK
Answer: A: CCK 
Explanation: A i.e. CCK Most potent stimulus for causing gall bladder contraction is CCK-PZQ.