In the figure (not drawn to scale), ABC is a straight line, \[\angle DBE\]is a right angle and \[\angle a=\angle b=\angle c=\angle d\]. Find \[\angle a\].

• A.  \[{{22.5}^{o}}\]                 
• B.  \[{{30}^{o}}\]        
• C.         \[{{45}^{o}}\]        
• D.         \[{{60}^{o}}\]