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
[{'content': 'A 5–year old child is assessed to have a developmental age of one year. His developmental quotient would be – \nSelect and explain. \nA. 100, B. 80, C. 60, D. 20', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]