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': 'Cell motility is due to protein \nSelect and explain. \nA. Motilin, B. Centromere, C. Microtubule, D. Microfilament', 'role': 'user'}, {'content': 'Answer: C \nExplanation: Microtubules contains globular proteins -\xa0α and\xa0β tubulin which helps in cell motility and intracellular transport.', 'role': 'assistant'}]