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: Gynaecology & Obstetrics
[{'content': 'MC site of primary carcinoma in a case of Krukenberg tumour is: March 2004 \nSelect and explain. \nA. Gall bladder, B. Stomach, C. Breast, D. Lung', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Ans. B i.e. Stomach', 'role': 'assistant'}]