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: Pathology
[{'content': 'Blood group antigens chemically are \nSelect and explain. \nA. Carbohydrate, B. Glycoprotein, C. Phospholipids, D. Polysaccharide', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans is 'b' i.e.,Glycoprotein The ABO antigens are determined to be glycoproteins and glycolipids.", 'role': 'assistant'}]