The main function of HCL present in gastric juice isA) Digestion of starchB) Emulsification of fatC) Conversion of pepsinogen to pepsinD) Detoxification of harmful constituents of food

The correct answer is C) Conversion of pepsinogen to pepsin.

Hydrochloric acid (HCL) present in gastric juice plays a crucial role in the digestive process by facilitating the conversion of pepsinogen, an inactive enzyme precursor, into its active form called pepsin. Pepsin is responsible for the breakdown of proteins into smaller peptides.

HCL also creates an acidic environment in the stomach, which is important for the activation of various digestive enzymes and the breakdown of food particles. However, it is worth mentioning that HCL does not have a direct role in the digestion of starch or emulsification of fat. The digestion of starch primarily occurs in the small intestine with the help of pancreatic amylase, while the emulsification of fat is mainly facilitated by bile salts from the liver and gallbladder.