question_answer

In the given figure, C and D are the points on the semicircle described on AB as diameter. Given that \[\angle BAD=60{}^\circ \] and \[\angle DBC=40{}^\circ \]. Which one of the following options represent the measure of\[\angle ABD?\]

A)  \[30{}^\circ \]  

B)  \[40{}^\circ \]

C)  \[50{}^\circ \]                         

D)  \[60{}^\circ \]

E)  None of these