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In the triangle, if AB=AC and `angle ABC = 72^@`, then `angle BAC` is:
एक त्रिभुज में, यदि AB=AC तथा `angle ABC = 72^@` है, तो कोण BAC का मान क्या होगा ?

A

`36^@`

B

`30^@`

C

`54^@`

D

`18^@`

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