Answer:
d) none of the above
Explanation:
In the stomach, the upper and lower parts of the stomach have different pH values.
The upper part has a pH ranging from 4 to 6.5, while the lower part is highly acidic, with a pH ranging from 1.5 to 4.
The hydrochloric acid(HCl) found in gastric juice helps promote pH reduction to destroy bacteria present in food, and also allowing the action of enzymes like pepsin and tripsin, as HCl can reduce the pH to values below 2.5 so that the food goes into the intestine during the digestion process.
Therefore, it can be concluded that the correct alternative is D, since the ideal stomach pH must be acidic (pH values below 7).
