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
In epidural lumbar puncture, all structure are pierced except: 
Select and explain. 
A. Posterior longitudinal ligament, B. Ligamentous flavum, C. Interspinous ligament, D. Supraspinous ligament
A: Posterior longitudinal ligament
Answer: A: Posterior longitudinal ligament 
Explanation: A i.e. Posterior longitudinal ligamentPosterior longitudinal ligament lies along the posterior surface of veebral bodies. So it would not be pierced during lumber puncture.