This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Integrated QBank, Subject name: Anatomy
A 40-year male presented to the ER with bleeding diathesis. He was diagnosed with Glanzmann thrombasthenia. The disorder is believed to be due to absence of a paicular platelet receptor protein. Which of the following drug acts as an anti-platelet agent by inhibiting the same platelet receptor protein? 
Select and explain. 
A. Ticlopidine, B. Tirofiban, C. Cilostazol, D. Dipyridamole
B: Tirofiban
Answer: B: Tirofiban 
Explanation: Glanzmann thrombasthenia is a qualitative platelet disorder due to absence of glycoproteins GPIIb/IIIa. Antiplatelet drugs acting by inhibition of GP IIb/IIIa are Abciximab Eptifibatide Tirofiban Other antiplatelet agents Aspirin: irreversible inhibition of cyclooxygenase leading to reduced synthesis of thromboxane A2 Clopidogrel, prasugrel and ticlopidine: blockade of platelet aggregation by ADP pathway by blocking P2Y12 receptors. Dipyridamole and cilostazol: inhibition of cGMP phosphodiesterase pathway