Assertion (A): A mineral is called ore, when metal is extracted from it conveniently and economically.
Reason (R): All ores are minerals but all minerals are not ores.
Minerals are naturally occurring chemical substances in the earth’s crust obtained by mining.
A mineral is called an ore only when the metal can be extracted from it conveniently and economically.
Thus, all ores are minerals but all minerals are not ores.
- The Assertion is True.
- Reason is also True.
And the Reason is NOT the correct explanation for the assertion.
So, the correct answer is (b)