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: Pathology
[{'content': 'Krukenberg adenocarcinoma of the ovary can occur as a result of metastases from all except- \nSelect and explain. \nA. Stomach, B. Breast, C. Liver, D. Pancreas', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Metastatic gastrointestinal & breast neoplasm to ovary are referred to as krukenberg tumors and are characterized by bilateral metastasis composed of mucin-producing signet-ring cells.\nThe primary sites are → Stomach (most common), Pancreas, Colon, Gall bladder, Breast.', 'role': 'assistant'}]