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: Surgery
After lifting something heavy from the ground, a patient complains of back pain, which is radiating to lateral leg and great toe of lower limb. The most probable diagnosis: 
Select and explain. 
A. L3-L4 disc prolapse, B. L4-L5 disc prolapse, C. L5-S1 disc prolapse, D. L5 fracture
B: L4-L5 disc prolapse
Answer: B: L4-L5 disc prolapse 
Explanation: Ans. b. L4-L5 disc prolapse