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: Physiology
[{'content': 'Facilitation of flexor muscle tone is by \nSelect and explain. \nA. Vestibulospinal tract, B. Tectospinal tract, C. Rubrospinal tract, D. Reticulospinal tract', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Rubrospinal tract facilitates flexor\xa0muscle and inhibits extensor muscles.\nVestibulospinal tract facilitates extensor muscle of lower limb and inhibits flexors.', 'role': 'assistant'}]