This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Bleeding Disorders, Subject name: Pathology
[{'content': 'After tonsillectomy, a 9 year old child is having continuous bleeding. Bleeding time and PTT are prolonged. Platelet count and PT are normal. What is your diagnosis \nSelect and explain. \nA. Von willebrand disease, B. Vitamin K deficiency, C. Immune thrombocytopenic purpura, D. Hemophilia A', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. (a) Von Willebrand disease(Ref: Robbins 9th/pg 661)a. Von willebrand disease: True: Bleeding time and aPTT prolonged, PT and platelet count normalb. Vitamin K deficiency: False: PT prolongedc. Immune thrombocytopenic purpura: False aPTT is normald. Hemophilia A: Flase: Bleeding time normal', 'role': 'assistant'}]