This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Platelet & Coagulation disorders, Subject name: Medicine
[{'content': 'Purpura fulminans is seen in? \nSelect and explain. \nA. Protein C deficiency, B. Protein S deficiency, C. AT III deficiency, D. Factor 5 leiden mutation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Purpura fulminans is a severe form of DIC resulting from thrombosis of extensive areas of the skin. It predominantly affects young children following viral or bacterial infection, paicularly those with inherited or acquired hypercoagulability due to deficiencies of the components of the protein C pathway.', 'role': 'assistant'}]