This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bleeding disorder, Subject name: Pathology
Thrombotic event is seen in all of following except: 
Select and explain. 
A. Paroxysmal nocturnal hemoglobinuria, B. Disseminated intravascular coagulation, C. Idiopathic thrombocytopenic purpura, D. Heparin induced thrombocytopenia
C: Idiopathic thrombocytopenic purpura
Answer: C: Idiopathic thrombocytopenic purpura 
Explanation: *PNH is seen due to PIGA gene defect - Pancytopenia Altered function of platelets - | risk of thrombosis Especially in cerebral & hepatic veins - | Moality *DIC is thrombo-hemorrhagic disorder *Heparin-induced thrombocytopenia has ab produced against platelet factor 4. Also associated with | risk of thrombosis *In ITP, Immune dysfunction characterized by ab formation against Platelet antigen. - Pt sequestration Coombs +ve, Hemolytic anemia -| platelet count - Bleeding