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: Physiology
Pain-sensitive intracranial structure is 
Select and explain. 
A. Piamater, B. Pial vessels, C. Duramater, D. Brain mater
C: Duramater
Answer: C: Duramater 
Explanation: Intracranial structures sensitive to pain are scalp, anponeurotica, duramater around venous sinuses & vessels, falx & tentorium cerebri, cranial venous sinuses, some arteries. Intracranial structures insensitive to pain are brain parenchyma, ventricular ependyma, duramater over convexity of skull, piameter, pial veins, arachnoidmater and choroids plexus.