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: Anatomy
[{'content': 'Which of this following pas of veebral canal will show secondary curves with concavity towards back? \nSelect and explain. \nA. Cervical Veibral Canal, B. Thoracic Veibral Canal, C. Sacral Veibral Canal, D. Coccyx Veibral Canal', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In adults, the cervical curve and lumbar curve is concave backwards. The thoracic and sacral curve is convex backwards.Ref: Clinical Anatomy by Systems, Richard S. Snell, Edition 2007, Chapter 12, Page 860; Anatomy at a Glance, Omar Faiz, 3rd Edition, Chapter 77, Page 175.', 'role': 'assistant'}]