If a child's chronological age is 12 years and his I.,Q. level is 75, then his mental age will be-

Options

A. 8 years
B. 9 years
C. 10 years
D. 12 years

Answer

B

Explanation

If a child's chronological age is 12 years and his I.,Q. level is 75, then his mental age will be 9 years..