<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 38-year-old man comes to the physician because of a 3-week history of right-sided knee pain. He works as a bricklayer and reports that the pain worsens when he kneels. He has no history of trauma. Examination of the right knee shows erythema, fluctuant swelling, and tenderness on palpation of the kneecap. Passive flexion of the right knee elicits pain. Which of the following structures is most likely affected in this patient?? A: Anserine bursa, B: Medial meniscus, C: Suprapatellar bursa, D: Synovial membrane, E: Prepatellar bursa,  <response>: This is a clinical vignette describing a 38-year-old man with right knee pain that has been present for 3 weeks. The pain worsens when he kneels, which is expected given his occupation as a bricklayer. On exam, he has erythema, swelling, and tenderness localized to the kneecap patella. Flexing the knee elicits pain. The clinical presentation is most consistent with prepatellar bursitis, which is inflammation of the prepatellar bursa. This bursa lies between the skin and the patella. Repeated kneeling and direct pressure on the knee from the patients occupation likely contributed to the development of prepatellar bursitis. The location of the physical exam findings localized to the patella support this diagnosis.E: Prepatellar bursa 