The number of geometrical isomers for octahedral \[{{\left[ Co{{\left( N{{H}_{3}} \right)}_{2}}C{{l}_{4}} \right]}^{-}}\], square planar \[AuC{{l}_{2}}Br_{2}^{-}\] and \[{{[Co(N{{O}_{2}}){{(N{{H}_{3}})}_{5}}]}^{2+}}\] are

• A. 2, 2, 2              
• B. 2, 2, no isomerism
• C. 3, 2, 2                            
• D. 2, 3, no isomerism