Assertion: `Fe^(3+)` can be used for coagulation of `As_(2)S_(3)` sol.
Reason: `Fe^(3+)` reacts with `As_(2)S_(3)` to give `Fe_(2)S_(3)`.

Options

A. If both assertion and reason are true and the reason is the correct explanation of the assertion.
B. If both assertion and reason are true and the reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If assertion is false but reason is true.

Answer

C

Explanation

Correct reason: `Fe^(3+)` neutralize the charge on the negatively charged, `As_(2)S_(3)` particles.