This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Growth and Development, Subject name: Social & Preventive Medicine
[{'content': 'Weight by height is normal for a child but he is low height by age. He is:- \nSelect and explain. \nA. Waste, B. Stunted, C. Wasted and stunted, D. None', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Low height for age: Stunting / Dwarfism (Chronic PEM) Low weight for height: Wasting / Emaciation (Acute PEM) Low weight for age: Underweight.(Acute on chronic PEM)', 'role': 'assistant'}]