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If I(1) int sin^(-1) ((2x)/(1 +x^(2)) ) ...

If `I_(1) int sin^(-1) ((2x)/(1 +x^(2)) ) ` dx ,
`I_(2) = int cos^(-1) ((1-x^(2))/(1 +x^(2)) ) ` dx ,
`I_(3) = int tan^(-1) ((2x)/(1 - x^(2)) ) ` dx , then `I_(1) + I_(2) - I_(3) ` =

A

`2x tan^(-1) " x- log " ( 1 + x^(2)) + c `

B

`2 [ "xtan"^(-1) x - log (1 + x^(2)) ] + c `

C

`2"xtan"^(-1) "x + log " ( 1 + x^(2)) + c `

D

0

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The correct Answer is:
A
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