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
Centrally acting muscle relaxant with α2 - adrenergic agonist activity is 
Select and explain. 
A. Chlorzoxazone, B. Baclofen, C. Tizanidine, D. Pirenzepine
C: Tizanidine
Answer: C: Tizanidine 
Explanation: Tizanidine is a centrally acting muscle relaxant with α2 - adrenergic activity, but unlike clonidine it has no effect on blood pressure.