This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Haematology, Subject name: Pathology
Bleeding time is not prolonged in- 
Select and explain. 
A. Von Willebrand's disease, B. Christmas disease, C. Haemophilia, D. Polycythemia
D: Polycythemia
Answer: D: Polycythemia 
Explanation: Bleeding time is prolonged in all the platelet disorders like ITP ,TTP and heparin and also prolonged in all types of coagulation disorders and DIC Where is it is normal in vascular diseases like vascular purpuras Reference: textbook of Pathology, 7th edition author Harsha Mohan, page number 317