The inner most meninx which adheres to the surface of the central nervous system is:

Correct option is D

The pia mater is the innermost layer of the meninges (protective membranes surrounding the brain and spinal cord) and directly adheres to the surface of the central nervous system. It is a thin, delicate membrane that follows the contours of the brain and spinal cord, including dipping into the sulci and fissures of the brain.

Information Booster:
• The meninges consist of three layers: dura mater (outermost), arachnoid membrane (middle), and pia mater (innermost)
• Pia mater is highly vascularized and supplies nutrients to the underlying nervous tissue
• It forms the inner boundary of the subarachnoid space where cerebrospinal fluid circulates
• The pia mater is closely associated with the formation of the blood-brain barrier
• It provides structural support and protection to the delicate neural tissue
• Inflammation of the pia mater and arachnoid membrane is called leptomeningitis

Additional Knowledge:
• Option 1: Dura mater is the outermost, toughest layer of the meninges
• Option 2: Arachnoid membrane is the middle layer, separated from the pia mater by the subarachnoid space
• Option 3: Subarachnoid space is not a membrane but the fluid-filled space between arachnoid and pia mater