This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Non communicable diseases, Subject name: Social & Preventive Medicine
[{'content': 'Rule of halves is seen in \nSelect and explain. \nA. CHD, B. Hypeension, C. Blindness, D. Accidents and injuries', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Hypeension is an iceberg disease. Only about half of the hypeensive subjects in general population were aware of the condition, only about half of those aware of the condition was being treated, and only about half of those treated were considered adequately treated.Park 23e pg: 373', 'role': 'assistant'}]