This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Pathology
[{'content': 'Which of the following is key area of nasal septum? \nSelect and explain. \nA. Anterosuperior pa of nasal septum, B. Anteroinferior pa of nasal septum, C. Posterosuperior pa of nasal septum, D. Posteroinferior pa of nasal septum', 'role': 'user'}, {'content': 'Answer: B \nExplanation: .', 'role': 'assistant'}]