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': 'Recurrent chalazion in old age may indicate: March 2004 \nSelect and explain. \nA. Squamous cell carcinoma, B. Basal cell carcinoma, C. Adeno carcinoma of the meibomian gland, D. Sebaceous gland carcinoma', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. C i.e. Adenocarcinoma of the meibomian giana', 'role': 'assistant'}]