This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Pediatrics
A male child of 15 years with a mental age of 9 years has an IQ of- 
Select and explain. 
A. 50, B. 60, C. 70, D. 80
B: 60
Answer: B: 60 
Explanation: Ans. is `b' i.e., 60