Question

Assertion (A) : 2800 mineral species have been identified, but only about 100 are considered ore minerals.
Reason (R) : All the ores have one or more minerals in them but not otherwise.

• A. Both (A) and (R) are true and (R) is the correct explanation of (A).
• B. Both (A) and (R) are true but (R) is the not the correct explanation of (A).
• C. (A) is true but (R) is false.
• D. (A) is false but (R) is true.

Answer 1

The correct option is A Both (A) and (R) are true and (R) is the correct explanation of (A).

The term ore is used to describe an accumulation of any mineral mixed with other elements, and the concentration of the mineral should be sufficient to make its extraction commercially viable. Hence, an ore might have multiple minerals in them but not vice versa.