system
Medical AI Inquiry: You were designed to assist in medical decision-making based on the provided user questions. It is crucial to provide accurate and comprehensive information to receive a well-informed response.
user
After L4- S1 the next commonest site of intervertebral disc prolapse is -
assistant
The correct answer is  L5 and L4 - L5 level → 80%.
C5 - C6 and C6–7 level → 19-20%.