question_answer

The diagonals AC and BD of a parallelogram ABCD intersect each other at the O such that \[\angle \mathbf{DAC}=\mathbf{4}{{\mathbf{0}}^{{}^\circ }}\]and \[\angle \mathbf{AOB}=\mathbf{8}{{\mathbf{0}}^{{}^\circ }}\], Then \[\angle \mathbf{DBC}=\]?

A)  \[{{40}^{{}^\circ }}\] 

B)  \[{{35}^{{}^\circ }}\]             

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

D)  \[{{50}^{{}^\circ }}\]