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
Adenosine deaminase inhibitors is - 
Select and explain. 
A. Pentostatin, B. TxA2, C. Cladribine, D. All
A: Pentostatin
Answer: A: Pentostatin 
Explanation: Ans. is 'a' i.e., Pemntostatin