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': 'Carcinosarcoma may arise in - \nSelect and explain. \nA. Uterus, B. Cervix, C. Vagina, D. Ovary', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Carcinosarcoma of uterus\n\nCarcinosarcomas consist of endometrial adenocarcinoma in which malignant sarcomatous (stromal) differentiation takes place.\nCarcinosarcoma has two components : -\n\n\nAdenocarcinoma\xa0→\xa0Therefore called carcinosarcoma\nSarcomatous component\xa0→\xa0Therefore called carcinosarcoma\n\n\nSarcomatous component may be striated muscle cells, cartilage, adipose tissue and bone.', 'role': 'assistant'}]