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1. ${(m - n)}^{n + 1} i s :$

Answer: Option D

Explanation:

m^{n} = 121 = {(11)}^{2} ∴ m = 11; n = 2 ∴ {(m - 1)}^{n + 1} = {(11 - 1)}^{2 + 1} = 10^{3} = 1000

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