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 5–year old child is assessed to have a developmental age of one year. His developmental quotient would be – 
Select and explain. 
A. 100, B. 80, C. 60, D. 20
D: 20
Answer: D: 20 
Explanation: None