<prompt> Marcus-Gunn sign is seen in -Retinitis pigmentosaRetinal detachmentDiabetic retinopathyHypeensive retinopathy  <response>: causes of Marcus Gunn pupil. In swinging flashlight test, the pupil on the diseasedside dilates on transferring light to it Optic neuritis Optic atrophy Retinal detachment Central retinal aery occlusion Central retinal vein occlusion Ref Comprehensive ophthalmology AK Khurana 4th edition page no 494 