Assertion Cations of both `Cu(II)` group and `Fe(III)` group are precipitated by passing `H_(2)S` gas but former in dilute acidic medium while later in dilute alkaline medium.
Reason Sulphides of `Cu(II)` group cations have lower solubility than that of `Fe(III)` group cations.
A. Both assertion and reason are correct and reason is the correct explanation of the assertion
B. Both assertion and reason are correct but reason is not the correct explanation of assertion
C. Assertion is correct but reason is incorrect
D. Assertion is incorrect but reason is correct