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: Anaesthesia
[{'content': 'Which of the following is predictor of difficult airway \nSelect and explain. \nA. Systemic lupus, B. Systemic sclerosis, C. Sarcoidosis, D. Cystic fibrosis', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Systemic sclerosis is associated with difficult airway.', 'role': 'assistant'}]