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': 'Plasma expanders are used in: \nSelect and explain. \nA. Severe anemia, B. Severe trauma, C. Pulmonary oedema, D. Cardiac failure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Essentials of medical pharmacology, seventh edition, page no 645 Answer is option 2,severe trauma Plasma expanders are used in burns, hypovoleimic and endotoxin shock, severe trauma, and extensive tissue damage. But they are not used in severe anemia, cardiac failure, pulmonary edema, liver disease, and renal insufficiency.', 'role': 'assistant'}]