Answer :

It is given in the question that,

In , A = 40o


B = 60o


We know that, sum of all angles of a triangle is equal to 1800


A + B + C = 180o


60o + 40o + C = 180o


C = 180o – 100o


C = 80o


Hence, the side which is opposite to C is the longest side of the triangle


Option (C) is correct

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