Assertion (A) : If three angles of a qu...

Assertion (A) : If three angles of a quadrilateral are `130^@,70^@` and `60^@` then the fourth angle is `100^@`
Reason(R) : The sum of all the angle of a quadrilateral is `360^@`
The correct answer is : (a) /(b)/(c )/(d).

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