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: Pathology
[{'content': "Which is a degeneration disorder characterized by atrophic changes of the deeper structures (e.g. fat, muscle, cartilage 8 bone) involving one side of the face: \nSelect and explain. \nA. Scleroderma, B. Parry Romberg syndrome, C. Miescher's syndrome, D. Peutz-Jeghers syndrome", 'role': 'user'}, {'content': 'Answer: B \nExplanation: None', 'role': 'assistant'}]