Curdling of milk is caused by -: (A) Rennin, (B) Lipase, (C) Amylase, (D) Elastase
Answer is A. Ans. is'a'i.e., Rennin [Ref: Concise oxford dictionary p. 1218iRennin is an enzyme secreted into the stomach of unweaned mammis causing the curdling of milk.