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': 'Lateral condylar guidance is \nSelect and explain. \nA. L = 12+d / H, B. L = H+d / 12, C. L = H/8 + 12, D. L = H+d / 4', 'role': 'user'}, {'content': 'Answer: C \nExplanation: None', 'role': 'assistant'}]