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: Social & Preventive Medicine
[{'content': 'Gomez classification is based on ? \nSelect and explain. \nA. Weight retardation, B. Height retardation, C. Mid arm circumference, D. Stunting', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Weight retardation", 'role': 'assistant'}]