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In DeltaABC, AC = BC and angleABC = 50^(...

In `DeltaABC`, AC = BC and `angleABC = 50^(@)`, the side BC is produced to D so that BC = CD then the value of `angleBAD` is

A

`80^(@)`

B

`40^(@)`

C

`90^(@)`

D

`50^(@)`

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