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In a triangle ABC, angle B=angleC=78^(@)...

In a triangle ABC, `angle B=angleC=78^(@)`. D & E are two points on side AB and AC such that `angle BCD=51^(@) and angle CBE=24^(@)`. Find angle `angle CDE=`?

A

`18^(@)`

B

`12^(@)`

C

`22^(@)`

D

None of these

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