Find the middle term in the expansion of...

Find the middle term in the expansion of `(x^(2)+(1)/(x^(2))+2)^(n)`

A

`(n!)/([(n//2)!]^(2))`

B

`(2n!)/([(n//2)!]^(2))`

C

`(1.3.5...(2n+1))/(n!) 2^(n)`

D

`((2n)!)/((n!)^(2))`

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The correct Answer is:

D

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