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': 'Singers Alkali denaturation test is done with: \nSelect and explain. \nA. Maternal Hb, B. Fetal Hb, C. Amniotic fluid, D. Menstrual fluid', 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]