This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: G.I.T., Subject name: Physiology
Which of the following is the most important stimulus for the secretion of bile: 
Select and explain. 
A. Bile salts, B. Bile acid, C. Secretin, D. CCK
A: Bile salts
Answer: A: Bile salts 
Explanation: Ans. A. Bile saltsCholagoguesCholereticsSubstances that cause contraction of gall bladder (CCK)Substances that increase the secretion of bile (bile salts are most potent)