Yes the OA is correct.
What answer you are getting?
A
z=u
we can not draw any information about x and y
[You can not assume lines to be parrallel]
B
ABCD is a parallelogram
z=x
and
y=u
but no link between x and y
A+B
we can easily conclude that x=y
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parallelogram question
Source: Beat The GMAT — Data Sufficiency |
