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
Pseudolymphoma is a manifestation of ? 
Select and explain. 
A. Phenytoin, B. Carbamazepine, C. Sodium valproate, D. Phenobarbital
A: Phenytoin
Answer: A: Phenytoin 
Explanation: 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.