In epidural lumbar puncture, all structure are pierced except -: (A) Posterior longitudinal ligament, (B) Ligamentum flavum, (C) Interspinous ligament, (D) Supraspinous ligament
Answer is A. Structure pierced during lumbar puncture (from outside in) are :-

Skin → Subcutaneous tissue → Supraspinous & interspinous ligament → Ligament flavum → Dura matter → Arachnoid matter.