Which of the following option are correct?

Options

A. Wrought iron is a purest form of iron.
B. `Ca_(3)(PO_(4))_(2)O` is called Thomas slag, used as a fertilizer.
C. In a puddling process, `Fe_(2)O_(3)` act as a oxidising agent.
D. `FeSiO_(3)` slag is formed during the extraction of Cu.

Answer

A,C,D