Correct Answer: Biased

Solution : The correct choice is the third option .

Impartial means not favouring one side or party over another. Biased means to show an unreasonable liking or dislike for someone or something based on personal opinions, making it the correct antonym.

The meanings of the other options are as follows:

• The word intellectual is used to describe someone who is very intelligent and well-educated.
• Objective means an aim.
• Pious is used to describe someone who is very religious.