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
True regarding origin and inseion of piriformis ? 
Select and explain. 
A. 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
B: Origin from sacrum & ilium and iseion on GT
Answer: B: Origin from sacrum & ilium and iseion on GT 
Explanation: Origin from sacrum & ilium and iseion on GT