Answer:
B: turns litmus red
Explanation:
Looking at the given options;
An acid tastes sour and not bitter and so option A is not correct.
Acid turns blue litmus paper red and not any litmus paper. Thus option B is correct.
Acid has a PH < 7. Thus option C is not correct.
An acid feels just wet while it is a base that feels slippery to touch. Option D is not correct.
