<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 14-year-old boy is brought to the physician for the evaluation of back pain for the past six months. The pain is worse with exercise and when reclining. He attends high school and is on the swim team. He also states that he lifts weights on a regular basis. He has not had any trauma to the back or any previous problems with his joints. He has no history of serious illness. His father has a disc herniation. Palpation of the spinous processes at the lumbosacral area shows that two adjacent vertebrae are displaced and are at different levels. Muscle strength is normal. Sensation to pinprick and light touch is intact throughout. When the patient is asked to walk, a waddling gait is noted. Passive raising of either the right or left leg causes pain radiating down the ipsilateral leg. Which of the following is the most likely diagnosis?? A: Ankylosing spondylitis, B: Spondylolisthesis, C: Facet joint syndrome, D: Disc herniation, E: Overuse injury,  <response>: This is a clinical case about a 14-year-old boy with chronic back pain that is worse with exercise and when reclining. Key findings include:- Back pain for 6 months, worse with exercise and when reclining - On swim team and lifts weights regularly- No prior trauma or joint problems- Father has a disc herniation- Physical exam shows two adjacent vertebrae displaced at different levels- Normal muscle strength- Normal sensation- Waddling gait- Raising leg causes radiating pain down legBased on the chronic nature, association with exercise, physical exam findings of vertebral displacement and radiating pain with leg raising, the most likely diagnosis is spondylolisthesis. Ankylosing spondylitis would not cause vertebral displacement. Facet joint syndrome and disc herniation would not typically cause findings this severe in someone so young without trauma. Overuse injury could cause chronic back pain but would not explain the vertebral displacement or radiating pain.B: Spondylolisthesis 