In an acute-angled triangle ABC if sin (...

In an acute-angled triangle ABC if sin `(B + C - A) = (sqrt3)/2` and `tan (C+A-B) = 1`, then C is equal to

A

`37.5^(@)`

B

`67.5^(@)`

C

`5.25^(@)`

D

`72.5^(@)`

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The correct Answer is:

C

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