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: Medicine
[{'content': 'Blood components are all except - \nSelect and explain. \nA. Whole blood, B. Platelet concentrate, C. Fresh frozen plasma, D. RBC concentrate', 'role': 'user'}, {'content': "Answer: A \nExplanation: Blood components are prepared from whole blood collected from individual donors & include red cells,platelet,plasma & cryoprecipitate.Reference :Davidson's principles & practice of medicine 22nd edition pg no 1012.", 'role': 'assistant'}]