B) $Ca_{3}\left( PO_{4} \right)_{2}\ .\ CaSiO_{3}$
C) $MgSiO_{3}$
D) $CaSiO_{3}$
Explanation
(b)
Thomas slag or phosphatic slag is a mixture of calcium phosphate and calcium silicate $\left\lbrack Ca_{3}\left( PO_{4} \right)_{2}\ .\ CaSiO_{3} \right\rbrack.$ It is used as manure.
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.