Correct Answer: Option A

Explanation

\(3\sqrt{45}-12\sqrt{5}+16\sqrt{20}\)
3\(\sqrt{5\times 9}-12\sqrt{5}+16\sqrt{4\times 5}\)
3\(\times 3\sqrt{5}-12\sqrt{5}+16\times 2\sqrt{5}\)
9\(\sqrt{5}-12\sqrt{5}+32\sqrt{5}\)
29\(\sqrt{5}\)

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