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': 'Microstructure of cobalt chromium alloy in cast\ncondition is \nSelect and explain. \nA. fibrous, B. homogeneous, C. inhomogeneous, D. amorphous', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]