Answer: hydrochloric acid.
- A hydrochloric acid
- B strong sulfuric acid
- C dilute nitric acid
- D weak acetic acid
Correct answer: A. hydrochloric acid
Explanation: The stomach secretes hydrochloric acid, activating pepsin and killing microbes.
The human digestive system. Image: LadyofHats (Mariana Ruiz), Public Domain, via Wikimedia Commons.
Concept context
The digestive tract, digestive enzymes, hormonal control of digestion, and liver function. High NEET weightage.