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: Ophthalmology
[{'content': 'Chalazion is \nSelect and explain. \nA. An acute suppurative staphylococcal infection of glands of zeis or moll, B. A chronic non-infective, non-suppurative lipo-granulomatous inflammation of meibomian gland, C. An acute primary staphylococcal infection of meibomian gland, D. A viral infection commonly affecting children', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]