<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 48-year-old woman visits the clinic with unintentional weight loss for the past 3 months. She is also concerned about difficulty swallowing solid food. She also has early satiety and mild abdominal discomfort. An upper gastrointestinal endoscopy is advised along with a biopsy. The histopathological report reveals gastric adenocarcinoma. She then undergoes a subtotal gastrectomy and is started on an adjuvant chemotherapy regimen with platinum and fluoropyrimidine. 2 weeks later she develops acute respiratory distress and chest pain. A D-dimer test is positive. Her blood pressure is 12578, heart rate is 110min, and oxygen saturation is 88. CT scan of the chest reveals a clot in the anterior segmental artery in the right upper lung. Which of the following therapies should the patient be started on for her acute condition?? A: Warfarin, B: Clopidogrel, C: Low-molecular weight heparin, D: Ticagrelor, E: Aspirin,  <response>: This is a clinical vignette describing a 48-year-old woman with gastric cancer who underwent gastrectomy and chemotherapy, and now presents with acute respiratory distress and chest pain. A D-dimer test is positive and CT scan shows a pulmonary embolism. The question asks which therapy should be started for her acute condition.The key facts are:- Patient has gastric cancer status post gastrectomy and chemotherapy - Now has acute respiratory distress, chest pain, tachycardia, hypoxia - D-dimer positive, CT shows pulmonary embolismThis clinical presentation is most consistent with acute pulmonary embolism. The priority is to start rapid anticoagulation to prevent further clot extension and cardiovascular collapse. Of the answer choices, low-molecular weight heparin LMWH provides the most rapid onset of action as an injectable anticoagulant. Warfarin and clopidogrel do not provide rapid anticoagulation. Ticagrelor is an antiplatelet agent, not an anticoagulant. Aspirin is inadequate for treating an acute pulmonary embolism.C: Low-molecular weight heparin 