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In a "DeltaA B C","\ "/"C"=60"\ "&\ /A=7...

In a `"DeltaA B C","\ "/_"C"=60"\ "&\ /_A=75.` If `D` is a point on `A C` such that area of the `"DeltaB A D"` is `sqrt(3)` times the area of the `"DeltaB C D",` then the `/_"A B D"=` `60^0` (b) `30^0` (c) `90^0` (d) none of these

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