This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Anatomy
[{'content': 'Most essential drugs should be formulated as \nSelect and explain. \nA. No compound, B. Single compound, C. Multiple compounds, D. Fixed dose combinations', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]