<prompt> Leptomeninges is formed by:Dura mater and ArachnoidArachnoid and pia materDura and pia materDura, arachnoid and pia matter  <response>: Ans. B Arachnoid and pia materRef: Netters Clinical Anatomy, 3rd ed. pg. 25 Meninx implies all three layers--dura, arachnoid and inner pia matter. The dura mater is called pachymeninx. The middle arachnoid and inner pia matter is called as leptomeninges. The arachnoid does not follow the convolutions of brain and looks like a loose fitting sac. Multiple arachnoid granulations pass through subarachnoid space and blends with pia matter. 