In this task, you are given a question and answer options for that question. Using this information, you have to classify each text into different topics: medicine, nursery, psychology, chemistry, pharmacology, biology.

Question: A 70-year-old man presents, for a few months, without previous trauma, lumbar pain, difficulty walking, loss of strength and paresthesias in lower limbs, having to stop a few meters after starting it. The patient is increasingly inclining the trunk forward. What is the most likely diagnosis?
Options: <0> Osteoporotic lumbar vertebral fracture. <1> Central herniated disc L5-S1. <2> Spondylodiscitis. <3> Stenosis of the lumbar canal. <4> Degenerative lumbar scoliosis.
medicine