If (x+1/x+x^2+1/x^2)^11=a0x^(-22)+a1x^(-...

If `(x+1/x+x^2+1/x^2)^11=a_0x^(-22)+a_1x^(-21)+.....+a_44x^(22)`, then `a_0+a_2+a_4+...+a_44` is a multiple of

A

`2^20`

B

`2^21`

C

`2^10`

D

`2^11`

Verified by Experts

The correct Answer is:

A, B, C

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