Root value for nerve to Quadratus femoris -
L1L2 L3
L2 L3 L4
L4 L5 S1
S1 S2 S3
Ans. is 'c' i.e., L4 L5 S1o Nerve to quadratus femoris is a branch of sacral plexus with root value L4 L5 S\.Sacral plexus has been explained in previous sessions.
Nerves of Lower Extremity