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: Anatomy
[{'content': 'True regarding origin and inseion of piriformis ? \nSelect and explain. \nA. Origin from sacrum & ilium and inseion on LT, B. Origin from sacrum & ilium and iseion on GT, C. Origin from ischeal tuberosity and inseion on LT, D. Origin from ischeal tuberosity and inseion on GT', 'role': 'user'}, {'content': 'Answer: B \nExplanation: Origin from sacrum & ilium and iseion on GT', 'role': 'assistant'}]