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. `(i),(ii)` and `(iii)` are correct
B. `(ii),(iii)` and `(iv)` are correct.
C. `(i),(ii)` and `(iv)` are correct.
D. `(i),(ii),(iii),(iv)` are correct.

Answer

3

Explanation

These are the characteristic of roasting.