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': 'Primary curvatures of veebral column are \nSelect and explain. \nA. Cervical & lumbar, B. Thoracic & sacral, C. Cervical & thoracic, D. Thoracic & Lumbar', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]