This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Ear, Subject name: ENT
[{'content': "Mac Ewan's triangle is also known as? \nSelect and explain. \nA. Supratemporal triangle, B. Suprameatal triangle, C. Supramastoid triangle, D. Supratympanic triangle", 'role': 'user'}, {'content': "Answer: B \nExplanation: Ans. is 'b' i.e., Suprameatal triangle * MacEwen's triangle or suprameatal triangle. It is bounded above by supramastoid crest, anteroinferiorly by posterosuperior margin of external auditory canal and posteriorly by a tangent drawn from zygomatic arch.", 'role': 'assistant'}]