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: Psychiatry
According to Wechsler intelligence scale scoring, average IQ of a normal child is: 
Select and explain. 
A. 50, B. 75, C. 90, D. 111
C: 90
Answer: C: 90 
Explanation: Ans. c. 90