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: Gynaecology & Obstetrics
[{'content': 'CA - 125 is a tumor marker for rn \nSelect and explain. \nA. Carcinoma ovary, B. Carcinoma endometrium, C. Carcinoma vagina, D. Carcinoma cervix', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Ans. is a i.e. Carcinoma ovary CA - 125 is a glycoprotein secreted by malignant epithelial tumours of ovary. CA - 125 level correlates with volume of tumour and is elevated in 50% of Stage I tumour and 90% of tumours with Stage II or higher. CA - 125 level is also useful for follow up after treatment. Level > 35 units/ml suggests residual tumour. Remember : Two best screening test for ovarian ca are measurement of CA - 125 levels and transvaginal USG. CA - 125 is raised in : Other conditions in which CA - 125 is raised are : * Abdominal tuberculosis Chronic liver disease In a post menopausal women with an asymptomatic pelvic mass and CA - 125 > 65 tEml is very sensitive for diagnosis of ovarian epithelial tumour.', 'role': 'assistant'}]