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
Pentostatin acts by inhibiting - 
Select and explain. 
A. RNA dependent DNA polymerase enzyme, B. Aldolase enzyme, C. Adenosine deaminase enzyme, D. Adenyl cyclase enzyme
C: Adenosine deaminase enzyme
Answer: C: Adenosine deaminase enzyme 
Explanation: Ans. is 'c' i.e., Adenosine deaminase enzyme o Pentostatin inhibit adenosine deaminase (ADA)