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In a Delta ABC, (AB)/(AC) = (BD)/(DC) , ...

In a `Delta ABC, (AB)/(AC) = (BD)/(DC) , /_B = 70^@ and /_C = 50^@`, then `/_BAD`?

A

`30^(@)`

B

`45^(@)`

C

`60^(@)`

D

`75^(@)`

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