Which of the following is correct ........

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Which of the following is correct?

Protein digestion starts in the buccal cavity, the enzyme ptyalin digests protein into peptones.

Trypsin, pepsin and ptyalin are digestive enzymes.

Ulcer is caused by excessive basic secretion which causes irritation of the mucosa layer of the stomach.

Common bile duct releases its content into the stomach.

ulcer is caused due to exceesive acid secretion in the stomach lines.

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