This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Spinal injuries, Subject name: Anatomy
Prolapsed interveebral Disc is most common at- 
Select and explain. 
A. C10C11, B. C2C3, C. L2L4, D. L5S1
D: L5S1
Answer: D: L5S1 
Explanation: L5-S1 disc space is the most commonly involved space in disc prolapse. "Lumbar interveebral disc herniation is most common at L5-S1 and slightly less common at L4 - L5, and rare at L3-L4 or above". "The disc at L5-S1 is most commonly involved, followed in order by L4-L5 and L3-L4". REF : MAHESWARI 9TH ED