This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Gestational Trophoblastic Disease, Subject name: Gynaecology & Obstetrics
[{'content': 'A case of gestational trophoblastic neoplasia is detected to have lung metastasis. She should be staged as: \nSelect and explain. \nA. Stage-I, B. Stage-II, C. Stage-III, D. Stage - IV', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Ans. is c, i.e. Stage IIIRef. COGDT 10/e, p 893Staging of Gestational trophoblastic disease:Stage-I Disease confined to uterus.Stage-II Disease extending outside of the uterus but limited to the genital structures (adnexa, vagina, broad ligaments).Stage-III Disease extending to the lungs, with or without known genital tract involvement.Stage-IV Disease at other metastatic sites viz brain, liver, kidney or gastrointestinal tract.', 'role': 'assistant'}]