Which of the following are square planar complexes

Which of the following square planar complexes has two geometrical isomers ?

Which of the following square planar complexes will form two geometrical isomers?

Which of the following square planar complexes can show geometrical isomerism ?

Square planar complexes are generally formed by d^(8) ions with strong field ligands. The crystal field splitting is larger for second and third row transition elements and for more highly charged species. All the complexes having 4d^(8)" and "5d^(8) configuration are mostly square including those with weak field ligands such halide ions. Square planar complexes with coordination number four can show diastereoisomerism. Which one of the following square planar complexes will show geometrical isomerism ?

Which of the following types of square planar complexes can't show geometric isomerism ?

The square planar complexes are