Ptyalin is inactivated by a component of gastric juice called

Pepsin

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HCl

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Rennin

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Mucus

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Solution

The correct option is B HCl
A gastric gland in stomach secrets juice contains HCl which make stomach acidic. Hence, ptyalin is inactive in the stomach, thereby stopping starch digestion.
So, option B is the correct option.

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