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: Unknown
[{'content': 'Serum a-fetoprotein level is elevated in - \nSelect and explain. \nA. Endodermal cell tumor, B. Immature teratoma, C. Choriocarcinoma, D. Dysgerminoma', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans-Ai.e. "Endodermal cells a tumour" (Ref. Shaws, 12/e, p. 318, Novaks 13/e, p 1283).Alpha fetoprotein along with alpha-1-antitrypsin is secreted by endodermal cell tumours.These tumours are a second most common tumour of germ cell origin.', 'role': 'assistant'}]