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In triangle ABC, AD bot BC and BE bot AC...

In `triangle ABC`, `AD bot BC` and `BE bot AC`, AD and BE intersect each other at F. If BF = AC, then the measure of `angle ABC` is:
त्रिभुज ABC में, `AD bot BC` है तथा `BE bot AC` है | AD और BD एक दूसरे को F पर काटते है | यदि BF = AC है, तो `angle ABC` का माप क्या होगा ?

A

`45^@`

B

`60^@`

C

`70^@`

D

`50^@`

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