This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Medicine
[{'content': 'Post transfusion hepatitis is common with \nSelect and explain. \nA. Packed cell volume, B. Platelets, C. Whole blood, D. Albumin fraction', 'role': 'user'}, {'content': 'Answer: A \nExplanation: None', 'role': 'assistant'}]