Assertion (A): Natural crystals always containdefects.Reason (R): The defects may affect colour and.

Assertion (A): Natural crystals always containdefects.Reason (R): The defects may affect colour and canmake a crystal a valuable gem.(a) Both A and R are individually true and R is thecorrect explanation of A(b) Both A and R are individually true but R is NOT thecorrect explanation of A(c) A is true but R is false(d) A is false but R is true