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: Pharmacology
[{'content': 'Therapeutic drug development which is the newest agent ? \nSelect and explain. \nA. Ribozyme, B. Micro RNA, C. SnRNA, D. Retro RNA', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Micro RNA Mi RNAs regulate gene expression by pairing to target mRNAs, thus inducing translational repression. Novel findings indicate an orchestrated coregulation with long noncoding RNAs. Since its discovery, this small RNA species has opened new frontiers in cardiovascular diseases.", 'role': 'assistant'}]