<prompt> Drug which inhibits GPIIbIIIa and is platelet anti Aggregatory:ClopidogrelEnoxaparinFondaparinuxTirofiban  <response>: Ans. D. TirofibanGP IIbIIIA are the fibrogen activator receptor. On stimulating they activates the aggregation of platelets. Abciximab and tirofiban are the drugs which block these receptors and inhibit the platelet aggregation. 