<prompt> What is the extent of spinal cord in an adult?Lower border of L1Tip of CoccyxUpper border of L3S2  <response>: Ans. is a i.e., Lower border of LI Spinal cord begins at foramen magnum and, in adults, ends at lower border of LI.StructureExtends uptoAdult spinal cordInfant spinal cordLower border of L or upper border of L2Upper border of L3 vertebraeFilum terminalePiamaterTip of coccyxDural sheathSubdural spaceSub arachnoid spaceS2 vertebra 