This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Hematology, Subject name: Pharmacology
[{'content': 'Dextran is a good plasma expanders, but it has disadvantage of: \nSelect and explain. \nA. Interference with blood group matching, B. Causes thrombocytopenia, C. Decreases microcirculation, D. Promote roleaux formation', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Essentials of medical pharmacology, seventh edition, page no 645, Answer is option 1, intere with blood group matching It may interfere with blood grouping and cross matching. It can also interfere with coagulation and platelet function.', 'role': 'assistant'}]