Whatever opinion he gives is sane.

A arrogant
B wild
C obscure
D rational

Correct Answer: rational

Arrogant : having or revealing an exaggerated sense of one's own importance or abilities.
Wild : (of an animal or plant) living or growing in the natural environment; not domesticated or cultivated.
Obscure : not discovered or known about; uncertain.
Rational : based on or in accordance with reason or logic.
Sane : (of a person) of sound mind; not mad or mentally ill.

Synonym of Sane is Rational

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