Phosphorus is manufactured by heating one of the following mixtures in an electric furnace?
(a) Ca3(PO4)2 + SiO2
(b) SiO2 + C
(c) Ca3(PO4)2 + C
(d) Ca3(PO4)2 + SiO2 + C
Correct Option (d) Ca3(PO4)2 + SiO2 + C
Explanation: