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ABC is a triangle in which angleCAB = 80...

ABC is a triangle in which `angleCAB = 80^(@)` and `angleABC = 50^(@), AE, BF and CD` are the altitudes and O is the orthocentre. What is the value of `angleAOB` ?

A

`65^@`

B

`70^@`

C

`50^@`

D

`130^@`

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The correct Answer is:
D
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