<prompt> The following drug acts by hypomethylation-GemcitabineCapecitabineDecitabineCytosine arabinoside  <response>: 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. 