This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Choriocarcinoma, Subject name: Gynaecology & Obstetrics
[{'content': 'Most common site of metastasis in Choriocarcinoma is? \nSelect and explain. \nA. Liver, B. Lungs, C. Brain, D. Ovaries', 'role': 'user'}, {'content': 'Answer: B \nExplanation: ANSWER: (B) LungsREF: Shaw 14th e p- 233Sites of metastasis in choriocarcinomaLungs (80%) > vagina (30%) > pelvis (20%) > liver (10%) > brain (10%)', 'role': 'assistant'}]