Three of the following four numbers are alike in a certain way and oue is different.
Pick the number that is different from the rest.
As per the given options in the question, the given terms are in related as per the given terms,
$$12=4^2-4$$
$$56=8^2-8$$
$$30=6^2-6$$
But, option B is different from these.
$$14=4^2-2$$
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