Correct Answer: Genuine

Solution : The correct option is the first option .

In the context of the word authentic , genuine is the most appropriate synonym because it closely aligns with the meaning of authentic, which means genuine, real, or true. It refers to something that is not a copy, imitation, or counterfeit. The other options are either antonyms or have different shades of meaning.

The meanings of the other options are as follows:

• False means not true or fake. For example, false information is incorrect or misleading.
• Doubtful means uncertain or questionable. When something is doubtful, it's not considered genuine or trustworthy. For instance, a doubtful claim is one that is not easily believed.
• Corrupt refers to something that has been altered or tainted in a way that makes it dishonest or morally compromised. For example, a corrupt document has been tampered with to deceive others.