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If Un=|(n,1,5),(n^2, 2N+1,2N+1),(n^3,3N^...

If `U_n=|(n,1,5),(n^2, 2N+1,2N+1),(n^3,3N^2,3N+1)|`, then `sum_(n=1)^NU_n` is equal to (A) `2sum_(n=1)^Nn` (B) `2sum_(n=1)^N(n^2)` (C) `(1/2)sum_(n=1)^N(n^2)` (D) 0

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