This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Head & Neck, Subject name: Anatomy
Only ligament limiting extension of the vertebral column is- 
Select and explain. 
A. Anterior longitudinal ligament, B. Posterior longitudinal ligament, C. Supraspinous ligament, D. Ligamentum Flavum
A: Anterior longitudinal ligament
Answer: A: Anterior longitudinal ligament 
Explanation: Ans. is 'a' i.e., Anterior longitudinal ligament * The anterior longitudinal ligament is present anterior to the bodies of the vertebrae and prevents excessive extension of the vertebral column. Anterior atlanto-occipital ligament is considered as continuation of anterior longitudinal ligament.