This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head and neck, Subject name: Anatomy
[{'content': 'Which of this pa of veebral canal will show secondary curves with concavity backward? \nSelect and explain. \nA. Cervical, B. Thoracic, C. Sacral, D. Coccyx', 'role': 'user'}, {'content': 'Answer: A \nExplanation: In veebrates, cervical veebrae (singular: veebra) are the veebrae of the neck, immediately below the skull. Thoracic veebrae in all mammalian species are those veebrae that also carry a pair of ribs, and lie caudal to the cervical veebrae.', 'role': 'assistant'}]