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
Bile salts act as all except 
Select and explain. 
A. Emulsifying agent, B. Detergent, C. Surface tension lowering agents, D. Help in fat digestion
D: Help in fat digestion
Answer: D: Help in fat digestion 
Explanation: The bile salts have a number of impoant actions: They reduce surface tension and have detergent effects.In conjunction with phospholipids and monoglycerides, are responsible for the emulsification of fat preparatory to its digestion and absorption in the small intestine.They are amphipathic, that is, they have both hydrophilic and hydrophobic domain, therefore, the bile salts tend to form micelles.REF: GANONG&;S REVIEW OF MEDICAL PHYSIOLOGY PAGE NO:439,440