Which of the following words is closest in meaning to “Unique”?

Unique means being the only one of its kind; unequalled.

• Correct answer - unequalled: it has the same meaning as Unique.
• promising: showing signs of future success - wrong, it does not mean the same as Unique.
• common: found everywhere - wrong, it does not mean the same as Unique.
• fearless: without fear - wrong, it does not mean the same as Unique.