In the given figure, find the measure of\[\angle ROT,\] if \[PQ=QR\] and \[\angle QPR={{60}^{o}}\].

• A.  \[{{60}^{o}}\]                   
• B.         \[{{140}^{o}}\]
• C.  \[{{120}^{o}}\]                  
• D.         \[{{100}^{o}}\]