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: Pharmacology
[{'content': 'Heparin is - \nSelect and explain. \nA. Polysaccharide, B. Lipoprotein, C. Monosaccharide, D. Polyenoic acid', 'role': 'user'}, {'content': "Answer: A \nExplanation: Ans. is `a' i.e., Polysaccharide o Heparin is mucopolysaccharide.", 'role': 'assistant'}]