This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Stomach & Duodenum, Subject name: Surgery
[{'content': "Sister Joseph's nodule may indicated cancer of all the following except: \nSelect and explain. \nA. Stomach, B. Large bowel, C. Rectum, D. Ovary", 'role': 'user'}, {'content': 'Answer: C \nExplanation: Sister Mary Joseph nodule Gastrointestinal malignancies gynecological malignancies Gastric cancer (MC) Colonic cancer Pancreatic cancer (mostly body and tail) Ovarian cancer Uterine cancer', 'role': 'assistant'}]