If z(1+a)=b+i ca n da^2+b^2+c^2=1, then ...

If `z(1+a)=b+i ca n da^2+b^2+c^2=1,` then `[(1+i z)//(1-i z)=` `(a+i b)/(1+c)` b. `(b-i c)/(1+a)` c. `(a+i c)/(1+b)` d. none of these

A

`(a + ib)/(1 +c)`

B

`(a -ib)/(1 +c)`

C

`(a +ib)/(1-c)`

D

`(a-ib)/(1-c)`

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The correct Answer is:

A

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