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If `n > 3,` then `x y C_0-(x-1)(y-1)C_1+(x-2)(y-2)C_2-(x-3)(y-3)C_3+..............+(-1)^n(x-n)(y-n)C_n,` equals

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If `n > 3,` then `x y C_0-(x-1)(y-1)C_1+(x-2)(y-2)C_2-(x-3)(y-3)C_3+..............+(-1)^n(x-n)(y-n)C_n,` equals
A. xyz
B. nxyz
C. #REF!
D. 0
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Correct Answer - D
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