Correct Answer: Familiar

Solution : The correct choice is the first option.

The word rare means something that is uncommon, unusual, or not occurring frequently. Among the options provided, familiar is the most appropriate antonym, which denotes something that is well-known, common, or often encountered.

The meanings of the other words are:

• Latent: This refers to something that exists but is currently hidden, concealed, or not yet developed.
• Clarify: This means to make something clearer, easier to understand, or more comprehensible.
• Extraordinary: This describes something that is remarkable, exceptional, or uncommon in a positive way.

Therefore, the most appropriate antonym of the given word is familiar.