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': 'WHO STEPS is used for: \nSelect and explain. \nA. Communicable diseases, B. Non-communicable diseases, C. Immune-deficient diseases, D. Autoimmune diseases', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Non-communicable diseases [Ref. http://wwwwho.int/mediacentre/factsheets/fs273/en4 Repeat from May10', 'role': 'assistant'}]