A 45-year-old male presents with low back pain radiating to the right leg

 A 45-year-old male presents with low back pain radiating to the right leg

 A 45-year-old male presents with low back pain radiating to the right leg, numbness in the right foot, and weakness in plantar flexion. Which lumbar disc herniation is most likely?

A. L3-L4

B. L4-L5

C. L5-S1

D. S1-S2

E. L2-L3

Answer: C

Explanation: L5-S1 disc herniation compresses the S1 nerve root, causing low back pain radiating to the posterior thigh and calf, numbness in the lateral foot, and weakness in plantar flexion (toe pointing). L4-L5 herniation affects the L5 nerve root, causing weakness in dorsiflexion.