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': 'A female patient who is a known case of systemic sclerosis is posted for hernioplasty. You as anaesthesiologist is called to do pre-operative assessment. On oral examination you anticipate difficult intubation as only hard and soft palate are visible. You proceed with laryngoscopy and find that you are able to see only posterior glottis. What’s your laryngoscopic grading of glottis \nSelect and explain. \nA. 1, B. 2, C. 3, D. 4', 'role': 'user'}, {'content': 'Answer: B \nExplanation: As per cotmack and lehane laryngoscopic grading of glottis, it is grade 2 if only posterior glottis is visible.', 'role': 'assistant'}]