In the digestive system, the pH of the stomach and the intestine, respectively are,

Alkaline; acidic

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Acidic; alkaline

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Acidic; neutral

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Acidic; acidic

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Solution

The correct option is D Acidic; alkaline
The pH of the stomach is acidic of about 1-3 due to the presence of the hydrochloric acid. This acid helps in the activation of the digestive enzymes and killing of the microbes. The pH os the intestine is about 7.5 which is slightly alkaline. This helps in the inactivation of the acid and helps in further digestion of the nutrients.
Thus, the correct answer is option B.

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