<prompt> Deep petrosal nerve is formed fromSymathetic plexus around carotidFacial nerveGlossopharyngealInternal carotid plexus  <response>: The deep petrosal nerve,sympathetic in nature is a branch of the sympathetic plexus around the internal carotid aery.It contains postganglionic fibres from the superior cervical sympathetic ganglion. Ref,BDC VOL.3,Fouh edition 