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
Which of this pa of veebral canal will show secondary curves with concavity backward? 
Select and explain. 
A. Cervical, B. Thoracic, C. Sacral, D. Coccyx
A: Cervical
Answer: A: Cervical 
Explanation: 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.