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
[{'content': 'Which of the following is affected by platelet count- \nSelect and explain. \nA. Bleeding time, B. Prothrombin time, C. Patial thromboplastin time, D. Thrombin time', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Bleeding time is affected by platelet count.Platelets form critical role in haemostasis by forming the primary plug that initially seals vascular defects and by providing a surface that binds and concentrates activated coagulation factors. Prothrombin time assesses extrinsic and common coagulation pathway. PTT assesses the intrinsic and common clotting pathways. Thrombin time is a screening test for fibrinogen deficiency Reference ;1 Robbins and Cotran Pathologic basis of disease.South Asia Edition-9; volume 1.page no.117,656 2.Harsh Mohan textbook of pathology 7th edition.Pg no.307 308', 'role': 'assistant'}]