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': 'Introns are exised by \nSelect and explain. \nA. RNA splicing, B. RNA editing, C. Restriction endonuclease, D. DNAase', 'role': 'user'}, {'content': 'Answer: A \nExplanation: Introns are excised by RNA splicing by Sn-RNAs/Snurp.', 'role': 'assistant'}]