<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 48-year-old man comes to the physician for the evaluation of dyspnea and cough. He was diagnosed with esophageal cancer 10 months ago, for which he received radiochemotherapy. He has a history of atopic dermatitis and has smoked one pack of cigarettes daily for 30 years. Auscultation of the lungs shows decreased breath sounds bilaterally. Spirometry shows an FVC of 78 and an FEV1FVC ratio of 95. Which of the following is the most likely underlying condition?? A: Chronic bronchitis, B: Pulmonary emphysema, C: Allergic asthma, D: Pulmonary fibrosis, E: Pulmonary embolism,  <response>: Based on the information provided in the question stem, the key findings are:- 48-year-old man with dyspnea and cough- History of esophageal cancer 10 months ago, received radiochemotherapy- History of atopic dermatitis - 30 pack-year smoking history- Decreased breath sounds bilaterally on auscultation - Spirometry shows reduced FVC but normal FEV1FVC ratioThe reduced FVC with normal FEV1FVC ratio indicates a restrictive lung disease rather than an obstructive pattern. The history of radiochemotherapy for esophageal cancer along with decreased breath sounds bilaterally makes pulmonary fibrosis the most likely diagnosis over other choices like chronic bronchitis, emphysema, asthma, or pulmonary embolism.D: Pulmonary fibrosis 