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': 'Elongation arrest occurs due to \nSelect and explain. \nA. SRP- R, B. SRP, C. Signal peptide, D. Docking protein', 'role': 'user'}, {'content': 'Answer: B \nExplanation: B i.e. SRP', 'role': 'assistant'}]