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': 'Under the national TB programme, for a PHC to be called a PHC-R, requisite is: \nSelect and explain. \nA. Microscopy, B. Microscopy plus radiology, C. Radiology, D. None of the above', 'role': 'user'}, {'content': "Answer: B \nExplanation: Microscopy Facilities are available at all Primary health centres (PHC). Those Primary health centres (PHC) with additional Radiology facility were called PHC-R (R for Radiology) under the national tuberculsis (TB) programme. Ref: Park's Textbook of Preventive and Socaial Medicine By K.Park, 18th Edition, Page 335.", 'role': 'assistant'}]