Consider the following statements . Roasting is carried out to `:`
`(i)` convert sulphide to oxide and sulphate.
`(ii)` to remove impurities of `CuS` and `FeS` present in the ore of tin stone `(SnO_(2))` as `CuSO_(4)` and `FeSO_(4)`.
`(iii)` melt the ore.
`(iv)` remove arsenic and sulphur impurities.
of these statements.

Options

A. 1,2 and 3 are correct
B. 1 and 4 are correct
C. 1,2 and 4 are correct
D. 2,3 and 4 are correct.

Answer

C