With the usual notation, in DeltaABC, if...

With the usual notation, in `DeltaABC`, if `angleA+angleB=120^@, a=sqrt3 +1` and `b=sqrt3-1`, then the ratio `angleA:angleB`, is

A

`9:7`

B

`7:1`

C

`3:1`

D

`5:3`

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The correct Answer is:

B

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