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: Pharmacology
[{'content': 'Pseudolymphoma is a manifestation of ? \nSelect and explain. \nA. Phenytoin, B. Carbamazepine, C. Sodium valproate, D. Phenobarbital', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is 'a' i.e., Phenytoin Phenytoin on long term administration can lead to lymphadenopathy which is sometimes difficult to distinguish from malignant lymphoma. It is known as pseudolymphoma.", 'role': 'assistant'}]