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: Dental
[{'content': 'Intermediate filaments of epithelial cells is/are: \nSelect and explain. \nA. Cytokeratin, B. Microfilaments, C. Microfibrils., D. All of the above', 'role': 'user'}, {'content': 'Answer: A \nExplanation: They are called intermediate filaments as their diameter is intermediate between larger microtubules and smaller microfilaments.', 'role': 'assistant'}]