Select the most appropriate ANTONYM of the highlighted word.

They drank some spurious drink and fainted.

genuine

The most appropriate antonym of the highlighted word spurious is genuine.

• Spurious means "not genuine or authentic; false or counterfeit."
• Genuine means "being exactly what it purports to be; authentic."

The other words do not have the same meaning as spurious, so they are not its antonyms.

• Curious means "interesting or unusual."
• Nefarious means "wicked or villainous."
• Artificial means "made or produced by human beings rather than occurring naturally."

Therefore, the most appropriate antonym of spurious is genuine.