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
Which of the following cranial structures are insensitive to pain? 
Select and explain. 
A. Falx cerebri, B. Choroid Plexus, C. Middle meningeal Aery, D. Dural sheath surrounding vascular sinuses
B: Choroid Plexus
Answer: B: Choroid Plexus 
Explanation: Among the given options choroid plexus is the only pain insensitive structures, while rest are pain sensitive ones.