Correct Answer: Option B

Explanation

in the diagram;

x = 180º - ( 129 + 37)º = 14º ( sum of angles in a △)

z = x = 14º ( alternate angles are equal )

y = 180º - ( 112 + z )º = 14º ( sum of angles in a △)

y = 180º - ( 112 + 14)º = 54º

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