Which of the following acids are edible

Q. Which of the following acids are edible

(a) Citric acid

(b) Tartaric acid

(c) Hydrochloric acid

(d) Carbonic acid

1. (A) and (B) are correct
2. (A), (B) and (D) are correct
3. (A), (B) and (C) are correct
4. All are correct

 Answer: (A), (B) and (D) are correct