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
Cerebral perfusion pressure is - 
Select and explain. 
A. Aerial pressure minus peripheral venous pressure, B. Venous pressure minus aerial pressure, C. Aerial pressure minus intracranial pressure, D. Aerial pressure x venous pressure
C: Aerial pressure minus intracranial pressure
Answer: C: Aerial pressure minus intracranial pressure 
Explanation: Ans. is 'c' i.e., Aerial pressure minus intracranial pressure(Ref Principles of medical physiology p. 719.)Cerebral perfusion Pressure: is the difference between mean aerial pressure (MAP) and intracranial pressure.(ICP) or central venous pressure (CVP) whichever is greater. CPP is normally 80-100 mm Hg.