Questions: The most superficial meningeal layer is the Multiple Choice epidural sinus pla mater arachnoid layer dura mater

The answer is the last one (dura mater).

Explanation for each option:

• Epidural sinus: This is not a meningeal layer. The epidural space is the area between the dura mater and the vertebral wall, containing fat and small blood vessels.
• Pla mater: This seems to be a typographical error. The correct term is "pia mater," which is the innermost meningeal layer, not the most superficial.
• Arachnoid layer: This is the middle meningeal layer, situated between the dura mater and the pia mater.
• Dura mater: This is the outermost and most superficial meningeal layer, providing a tough protective covering for the brain and spinal cord.

Summary: The most superficial meningeal layer is the dura mater.