This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: miscellaneous, Subject name: Biochemistry
[{'content': 'Danaparoid is absent of \nSelect and explain. \nA. Chondroitin sulfate, B. Chitin, C. Dermatan sulphate, D. Heparan sulphate', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Danaparoid is a low molecular weight (LMW) and chondroitin sulfate. A natural', 'role': 'assistant'}]