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  3. 7th Class
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7th Class Science Sample Paper Science Olympiad Model Test Paper-21

  • question_answer
    Which one of the following protects the inner linings of stomach from its own secretions of hydrochloric acid?

    A) Mucus

    B) Pepsin enzyme

    C) Bile juice

    D) All of these

    E) None of these

    Correct Answer: A

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