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: Surgery
[{'content': 'A pt. comes with stony hard, painless lymphnode in left supraclavicular fossa A biopsy repo states Sq cell Carcinoma. What is the diagnosis - \nSelect and explain. \nA. Stomach carcinoma, B. Breast carcinoma, C. Lung carcinoma, D. Pancreas carcinoma', 'role': 'user'}, {'content': "Answer: C \nExplanation: Ans is 'c' ie. Lung Carcinoma Out of the 4 options only lung Ca is one which is of squamous cell histology . Rest 3 have squamous cell carcinoma in even less than 5 - 6% of cases. Stomach ---> MC is Adenocarcinoma* (95%) Pancreas --> MC is Duct cell adenocarcinoma* (85 - 90%) Breast --> Intraductal adenocarcinoma* (85%)", 'role': 'assistant'}]