Assertioin: Silicate minerals are seldon used for hte extraction of a metal.
Reason: Silicate minerals are very rare.

Options

A. Both A and R ar true and R is the correct explanation of A
B. Both A and R are true but R is not a correct explanation of A
C. A is true but R is false
D. A is false but R is true

Answer

D

Explanation

Silicate minerals are very common, however due to their less reactivity and high cost of extraction of metals from them, they are seldom used as ores.