Whatever opinion he give is sane.

Answer: Option A

rational : based on or in accordance with reason or logic.
obscure : not discovered or known about; uncertain.
wild : (of an animal or plant) living or growing in the natural environment; not domesticated or cultivated.
arrogant : having or revealing an exaggerated sense of one's own importance or abilities.
sane : reasonable or sensible.


Synonym of sane is rational