Correct Answer: Option C

Explanation

Z = X = Y = 180^o .........(i)

2Z + Y + Y = 190 = 2Z + 2Y = 180

Z + Y = 90^o........(ii)

hence x + (z + y) = 180

x + 90^o = 180^o

x = 180^o - 90^o

= 90^o

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