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\[\angle \mathbf{ABC}\].

In the shown figure, \[\mathbf{OA}\text{ }\parallel \text{ }\mathbf{CD

1.	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
Answer» C. \[30{}^\circ \]