This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Liver and Gall Bladder, Subject name: Physiology
Bile salts act as- 
Select and explain. 
A. Emulsifying agent, B. Detergent, C. Surface tension lowering agents, D. All of the above
D: All of the above
Answer: D: All of the above 
Explanation: Ans. is'd' i.e., All of the aboveBile saltso Bite salts are the most important constituents of the bile.o They are sodium and potassium salts of bile acids, conjugated to amino acids, glycine or taurine,o The important bile acids are cholic acid and chenodeoxycholic acid.o Bile acids are derived from cholesterol.o Bile salts help in digestion and absorption of fat by emulsification and micelles formation,o Bile salts act as detergents, i.e., they have surface tension lowering action.o Detergent action is dne to amphipathic nature of bile salts (Note : Amphipathic molecules are molecules that contain both hydrophobic non-polar as well as hydrophilic-polar ends).