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
Which of the following drugs is known to cause granuloma in the liver - 
Select and explain. 
A. Allopurinol, B. Nifedipine, C. Tetracycline, D. Methyl testosterone
A: Allopurinol
Answer: A: Allopurinol 
Explanation: Ans. is `a' i.e., Allopurinol Drugs causing granuloma in liver - o Phenylbutazone o Allopurinol o Diltiazem o Sulfonamides o Quinidine o Carbamazepine.