Whatever opinion he give is sane.
A
rational
B
obscure
C
wild
D
arrogant
Correct Answer: rational
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