question_answer

In the shown figure, \[\mathbf{OA}\text{ }\parallel \text{ }\mathbf{CD}\] and \[\angle \mathbf{OAB= 115{}^\circ }\] and\[\angle \mathbf{BCD}\text{ }=\text{ }\mathbf{125}{}^\circ \], find the value of\[\angle \mathbf{ABC}\].

A) \[20{}^\circ \]                                                              

B)  \[60{}^\circ \]          

C)  \[30{}^\circ \]                                                             

D) \[45{}^\circ \]

E)  None of these