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: Biochemistry
[{'content': 'Chitin contains- \nSelect and explain. \nA. a) Alpha 1-4 bond, B. b) Alpha 1-6 bond, C. c) Beta 1-6 bond, D. d) Beta 1-4 bond', 'role': 'user'}, {'content': 'Answer: D \nExplanation: Explanation- Chitin- Made up of N Acetyl D Glucosamine joined by b1 ------- 4 linkage.', 'role': 'assistant'}]