This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: General Concepts, Subject name: Pathology
[{'content': 'A 58-year-old man with a 700-pack-peryear smoking history presents to the emergency depament with shoness of breath and hemoptysis. Poable chest radiography demonstrates a large mass centrally located within the left lung field. The serum calcium is 13.0 mg/dL (normal 8.5 to 10.2). The metabolic abnormality described here is likely due to elaboration of which substance \nSelect and explain. \nA. Adrenocoicotropic hormone-like substance, B. Antidiuretic hormone, C. Carcinoembryonic antigen, D. Parathyroid-related hormone', 'role': 'user'}, {'content': "Answer: D \nExplanation: The man is likely to have a lung tumor, given his clinical presentation and the radiographic results. The patient's hypercalcemia is likely due to a paraneoplastic syndrome, such as that due to the elaboration of parathyroid-related hormone (PTrH). PTrH is produced by squamous cell carcinoma Adrenocoicotropic-like substance and antidiuretic hormone are produced by yet another form of lung cancer--small cell carcinoma of the lung. Carcinoembryonic antigen is an onco-fetal antigen produced by colon cancer cells. Erythropoietin causes secondary polycythemia and is related to renal cell carcinoma", 'role': 'assistant'}]