Who developed the concept of mental age?

Who developed the concept of mental age?

(A) Binet

(B) Guilford

(C) Terman

(D) Piaget

Answer 

The correct option is (A) : Binet

The concept of mental age was developed by Binet. His full name was Alfred Binet. He was a french psychologist.Mental age is used to measure the Intelligence Quotient.