Consider the following statements. 

(i) Calcination is carried out in absence of air below the melting point of the ore

(ii) Roasting and calcination are carried out in presence of flux

(iii) Calcination is carried out in limited supply of air above the melting point of the ore 

(iv) Roasting is carried out in air below the melting point of ore. The correct set of statements is

A

(i) and (iv)

B

(ii) and (iii)

C

(i), (iii) and (iv)

D

(iii) and (iv)