This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Child psychiatry, Subject name: Psychiatry
Which of the following is not true about imbecile mentally retarded patients? 
Select and explain. 
A. They need help for doing their daily activities and manage their affairs, B. It can be congenital or acquired at times, C. IQ is between 50-60, D. They have mental development equivalent to that of 3-4 yrs of age children
C: IQ is between 50-60
Answer: C: IQ is between 50-60 
Explanation: Imbecile is mentally retarded patients with IQ is between 25-49. IQ = (Mental age/Chronological age) X 100 Level of intelligence IQ Idiot 0-24 Imbecile 25-49 Moron 50-69 Borderline 70-79 Low normal 80-89 Normal 90-109 Superior 110-119 Very superior 120-139 Near genius > 140 Reference: Kaplon and sadock, 11 th edition, synopsis of psychiatry, 11 th edition, pg no.800