The voice is not affected in -
None of the given option is correct.
Only paralysis in which voice is not affected is bilateral abductor paralysis.
But in this question you can go ahead with unilateral abductor paralysis.
Though the voice is affected in early stages of unilateral abductor paralysis, it gradually improves due to compensation by the healthy cord which crosses the midline to meet the paralysed one.
Unilateral abductor palsy
Unilateral adductor palsy
Partial abductor palsy
Total adductor palsy