This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Rural & Urban Health Centres, Workers, Norms, Subject name: Social & Preventive Medicine
[{'content': 'Test done at sub Subcentre during pregnancy: \nSelect and explain. \nA. USG, B. Haemoglobin, C. OGTT, D. Triple test', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Tests done at Sub center: Pregnancy detection test Hemoglobin level estimation Urine test for albumin and sugar Rapid malaria test Tests done at PHC/CHC/DH: Blood grouping with Rh HIV testing VDRL, RPR Rapid Malaria test Blood Sugar HBSAg.', 'role': 'assistant'}]