This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Miscellaneous (Bio-Chemistry), Subject name: Biochemistry
Gastric enzyme which is present in the stomach of infants but absent from stomach of adults 
Select and explain. 
A. Pepsin, B. Rennin, C. Trypsin, D. Lipase
B: Rennin
Answer: B: Rennin 
Explanation: (B) Rennin # Rennin, also called Chymosin, is present in the stomach of infants and children.> It is involved in curdling of milk.> It converts casein to calcium paracaseinate which is digested by pepsin>It is absent in adults.