Question

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Explanation:

The word "rare" means not occurring often or being out of the ordinary. Among the options, "uncommon" has a similar meaning as it also refers to something that is not common or frequent. "Uncertain" relates to doubt, "expensive" relates to cost, and "usual" is the opposite of what "rare" means.

Answer:

B. uncommon (assuming the options are labeled with letters, but based on the choices, the correct one is "uncommon")