The logic followed here is,
$$\sqrt{49}$$ + $$\sqrt{81}$$ $$\Rightarrow$$ 7 + 9 = 16,
$$\sqrt{169}$$ + $$\sqrt{144}$$ $$\Rightarrow$$ 13 + 12 = 25,
$$\sqrt{484}$$ + $$\sqrt{624}$$ $$\Rightarrow$$ 22 + 25 = 47.
Hence, option B is the correct answer.Â
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