Phosphorus is obtained by

Phosphateissynthesized by the reduction of phosphate rock with coke at high temperature in the presence of silica in an electric furnace. The reaction of which is mentioned below- 3 4 2 2 4 1500 ( ) ( ) ( ) o C Ca PO s CO g CaO CO P → 2 2 CO C CO → 2 3 2 2 ( ) ( ) 2 CaO SiO s CaSiO l CO O CO → → Thus, the correct option is (a)