Consider the following statements.
Carboxylic acid turns red litmus to blue.
Formic acid produces black precipitate of silver with Tollen’s reagent whereas acetic acid does not give this test.
Aqueous solution of carboxylic acid on addition of sodium bicarbonate evolves hydrogen gas.
Select the correct option.

Options

A. Only I
B. Only II
C. Only III
D. All of the above

Answer

B