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 6 year old child with IQ of 50. Which of the following can the child do? 
Select and explain. 
A. Identify colours, B. Read a sentence, C. Ride a bicycle, D. Copy a triangle
A: Identify colours
Answer: A: Identify colours 
Explanation: IQ is defined by as the mental age divided by the chronological age multiplied by 100. In this case, a child of 6 years of age with an IQ of 50%, means that his mental age is that of a 3 year old child. At 3 years of age, a child can identify two colours. Ref: Essential paediatrics by OP Ghai, 6th edition, Page 543.