Which of the following is acidic in nature?
Correct option is A. Lime juice
$$\textbf{Concept Applied:}$$ Different substances have different pH, based on which they have acidic or basic nature.
$$\textbf{Correct Option:}$$ A
$$\textbf{Explanation for correct option:}$$ pH of lime juice is close to 2. It is acidic in nature.
$$\textbf{Explanation for incorrect options:}$$
(B) pH of limewater is close to 12. It is basic in nature.
(C) Blood is slightly basic with a pH close to 7.5.
(D) Antacid is basic in nature. It is used to neutralise stomach acid. Its pH is close to 10.