<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 46-year-old man is brought to the emergency department for the onset of severe pain in his right knee that occurred when he tripped while descending a staircase. As he landed, he heard and felt an immediate popping sensation in his right knee. His medical history is positive for obesity, hypertension, type 2 diabetes mellitus, severe asthma, and hyperlipidemia. He currently takes lisinopril, hydrochlorothiazide, metformin, atorvastatin, an albuterol inhaler, and a fluticasone inhaler. He recently completed a hospitalization and week-long regimen of systemic corticosteroids for a severe exacerbation of his asthma. The patients family history is not significant. In the emergency department, his vital signs are normal. On physical examination, his right knee is warm and swollen and he rates the pain as 910. He cannot stand or walk due to pain. He is unable to extend his right leg or flex his right thigh. A knee X-ray is ordered. Which of the following would best describe the cause of this presenting condition?? A: Meniscal tear, B: Femoral fracture, C: Quadriceps tendon tear, D: Avascular necrosis of the femur, E: Traction apophysitis of the tibia,  <response>: Based on the description, this 46-year-old man likely suffered a knee injury after falling down the stairs. Key details include sudden onset of severe knee pain after hearingfeeling a popping sensation, inability to extend or flex the leg due to pain, warmth and swelling of the knee joint, and an inability to bear weight. The choices describe different potential causes of acute knee paininjury. A meniscal tear A is possible given the mechanism of injury, but less likely to cause an inability to actively extendflex the knee. A femoral fracture B could cause pain and inability to bear weight, but is not typically associated with warmthswelling of the joint itself. Quadriceps tendon tear C is a strong possibility given the popping sensation and subsequent inability to actively extend the knee. Avascular necrosis of the femur D and apophysitis of the tibia E are chronic conditions unlikely to present acutely after trauma.C: Quadriceps tendon tear 