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': 'The use of porcelain laminates is indicated for: \nSelect and explain. \nA. Teeth in parafunction, B. Heavily restored teeth, C. Closure of 1 mm diastema, D. Lower anterior teeth', 'role': 'user'}, {'content': 'Answer: C \nExplanation: All other options are relative contraindications of porcelain veneers.', 'role': 'assistant'}]