<prompt> Please answer with one of the option in the bracket. Write reasoning in between . Write answer in between .Q:A 55-year-old male smoker presents to your office with hemoptysis, central obesity, and a round face with a moon-like appearance. He is found to have a neoplasm near the hilum of his left lung. A biopsy of the tumor reveals small basophilic cells with finely granular nuclear chromatin a salt and pepper pattern. Which of the following is the most appropriate treatment for this patient?? A: Tamoxifen, B: Prednisone, C: Surgical resection, D: Cisplatin and radiotherapy, E: Watchful waiting,  <response>: This is a clinical vignette describing a patient with symptoms and exam findings consistent with Cushings syndrome, likely due to an ectopic ACTH-producing tumor. The description of the lung tumor biopsy is classic for a small cell lung cancer. Small cell lung cancer can cause Cushings syndrome by ectopic production of ACTH. Surgical resection is not usually an option for small cell lung cancer due to its aggressive nature. Chemotherapy with cisplatin and radiotherapy is the most appropriate initial treatment. Tamoxifen and prednisone would not treat the cancer. Watchful waiting would be inappropriate for an aggressive cancer like small cell lung cancer.D: Cisplatin and radiotherapy 