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
The following drug acts by hypomethylation- 
Select and explain. 
A. Gemcitabine, B. Capecitabine, C. Decitabine, D. Cytosine arabinoside
C: Decitabine
Answer: C: Decitabine 
Explanation: Ans. is 'c' i.e., Decitabine o Decitabine a cytidine analogue (pyrimidine analogue), causes hypomethylation by inhibiting DNA methyl transferase. o Other drug causing hypomethylation by inhibiting DNA methyl transferase - Azacitidine.