If a child has the mental age of 5 years and chronological age of 4 years then what will e the I.Q. of a child?

If a child has the mental age of 5 years and chronological age of 4 ye

1.	If a child has the mental age of 5 years and chronological age of 4 years then what will e the I.Q. of a child?
A.	125
B.	80
C.	120
D.	100
Answer» B. 80