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': 'Witches chin is not associated with? \nSelect and explain. \nA. Ptosis of mentalis muscle, B. Long term edentulous mandible without denture, C. Loss of muscle attachment, D. Increased vertical dimensions', 'role': 'user'}, {'content': 'Answer: D \nExplanation: None', 'role': 'assistant'}]