question_answer

In the shown figure, if \[\mathbf{PQ}\text{ }\parallel \text{ }\mathbf{MN}\] and\[\mathbf{NO}\text{ }\parallel \text{ }\mathbf{QR}\], then which of the following conditions can be true?

A) \[x\text{ }=\text{ }y\]

B)  \[x+y=90{}^\circ \]

C)  \[x\text{ }+\text{ }y=180{}^\circ ~\]                                                  

D) \[x=90{}^\circ +y\]

E)  None of these