This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: None, Subject name: Radiology
[{'content': 'A 76 year old male with a history of dyspnoea on exeion was subjected to x-ray chest by the treating physician. The findings on the chest X-ray are given below. There is a history of fever with significant loss of weight and occasional bloody diarrhoea for the past 3 months. What is the most likely diagnosis? \nSelect and explain. \nA. Disseminated tuberculosis, B. Colon cancer with lung metastasis, C. Amebic liver abscess with rupture, D. Squamous cell carcinoma lung', 'role': 'user'}, {'content': 'Answer: B \nExplanation: This is an X-ray film showing multiple cannonball metastasis in the lung. The following neoplasms are most likely to spread to the lungs. Given the history it is likely to be a colorectal carcinoma. Melanoma Thyroid cancer Breast cancer Colorectal cancer Head and neck cancer Renal cell cancer Choriocarcinoma Testicular cancer Osteosarcoma Ewing sarcoma Wilms tumor Rhabdomyosarcoma Prostate cancer', 'role': 'assistant'}]