The correct option is
B Surrounds piamater
B. Surrounds piamater
Reason: The meninges is the membranous covering of the brain and spinal cord. There are three distinct layers known as dura mater, arachnoid mater, and pia mater respectively towards inside. These coverings have two major functions: Provide a supportive framework for the cerebral and cranial vasculature. So the correct option is B.