Question

Assertion (A): There are about 2000 minerals in the earth’s crust that have been identified and named.

Reason (R): The source of all minerals is hot molten magma.

विकल्प

• Both A and R are true and R is the correct reason for A.

• Both A and R are true but R is not the correct reason for A.

• A is true and R is false.

• A is false and R is true.

Answer 1

Both A and R are true and R is the correct reason for A.

Explanation:

About 2000 minerals have been identified and named in the earth’s crust. All minerals originate from the cooling and solidification of hot molten magma beneath the earth’s surface, which is the primary source of mineral formation.