Assertion : Sb (III) is not precipitated as sulphide when in its alkaline solution `H_(2)S` is passed.
Reason : The concentration of `S^(2-)` ion in alkaline medium is inadequate for precipitation.
A. If both assertion and reason are true and reason is the correct explanation of the assertion
B. If both assertion and reason are true but reason is not the correct explanation of the assertion.
C. If assertion is true but reason is false.
D. If the assertion and reason both are false.
