<prompt> A young man with blurring of vision in right eye, followed by left eye after 3 months, Showing disc hyperemia, edema, circumpapillary telangiectasia with normal pupillary response with centrocecal scotoma on perimetery, the cause isOptic atrophyOptic neuritisToxic optic neuropathyLebers optic neuropathy  <response>: Disc hyperemia, periperillary telangiectasia clearly so lebers optic neuropathy. 