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
Protoplasmic astrocytes are located in ? 
Select and explain. 
A. Gray matter, B. White matter, C. Inside blood vessels, D. Inside neurons
A: Gray matter
Answer: A: Gray matter 
Explanation: Ans. is'a'i.e., Gray matter[Ref: Clinical neurology 4h/e p. 7111There are following types of astrocytes :Protoplasmic AstrocytesThey are located in gray matter in close association with neurons.They provide nutrients, assist in metabolism and help in formation of blood-brain-barrier.