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': 'Alpha helix and Beta pleated sheet are examples of: \nSelect and explain. \nA. Primary structure, B. Secondary structure, C. Teiary structure, D. Quaternary structure', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. Secondary structure', 'role': 'assistant'}]