Froth floatation process used for the concentration of sulphide ore. Which of the following statements are correct
(a) It is based on the difference in wettablity of different minerals
(b) Sodium ethyl xanthat, `C_(2)H_(2)OCS_(2)` Na is used as collector
(c ) NaCN is used as depressant of ZnS and PbS

Options

A. (a),(b) only correct
B. (b) (c ) only correct
C. (a),(c ) only correct
D. (a), (b) ( c) are correct

Answer

4