question_answer

In the shown figure, AB is a tangent to the circle at A. If \[\angle \]BAC = \[\mathbf{40}{}^\circ \] and AC = BC, then \[\angle \]AED = ________

A)  \[{{60}^{o}}\]                       

B)                     \[80{}^\circ \]          

C)  \[100{}^\circ \]        

D)                                            \[85{}^\circ \]

E) None of these