In the given figure,\[\angle x\]is\[\frac{2}{3}\]of \[\angle y\], \[AB,\,\,PQ\] and \[CD\] are straight lines. What is \[\angle x\] expressed as a fraction of\[\angle z\]?

• A. \[\frac{1}{3}\]                          
• B. \[\frac{1}{2}\]              
• C. \[\frac{2}{3}\]              
• D.        \[\frac{3}{4}\]