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': 'Tiazinadine is - \nSelect and explain. \nA. GABAA agonist, B. Central alpha2 agonist, C. Anti-muscarinic agent, D. GABAB agonist', 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Central alpha2 agonist o Tizanidine is Central a2 adrenergic agonist - inhibits release of excitatory amino acids in the spinal interneurones.", 'role': 'assistant'}]