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(B) The complex $[Pt(NH_3)_2 Br_2]$ exhibits geometrical isomerism (cis-trans isomerism).$(A)$ $[Pt(en)(SCN)_2]$: This is a square planar complex with

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$C, D$

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(B) The complex $[Pt(NH_3)_2 Br_2]$ exhibits geometrical isomerism (cis-trans isomerism).$(A)$ $[Pt(en)(SCN)_2]$: This is a square planar complex with a bidentate ligand $(en)$. It cannot show cis-trans isomerism because the two donor atoms of the $en$ ligand are fixed in adjacent positions.$(B)$ $[Zn(NH_3)_2 Cl_2]$: This is a tetrahedral complex. Tetrahedral complexes do not exhibit geometrical isomerism because all positions are adjacent to each other.$(C)$ $[Pt(NH_3)_2 Cl_4]$: This is an octahedral complex of the type $[MA_2 B_4]$. It can exhibit cis-trans isomerism.$(D)$ $[Cr(en)_2(H_2 O)(SO_4)]^{+}$: This is an octahedral complex of the type $[M(AA)_2 BC]$. It can exhibit cis-trans isomerism.Thus,both $(C)$ and $(D)$ exhibit geometrical isomerism.

The complex(es),which can exhibit the type of isomerism shown by $[Pt(NH_3)_2 Br_2]$,is(are) [en $= H_2 NCH_2 CH_2 NH_2$ ]
$(A)$ $[Pt(en)(SCN)_2]$
$(B)$ $[Zn(NH_3)_2 Cl_2]$
$(C)$ $[Pt(NH_3)_2 Cl_4]$
$(D)$ $[Cr(en)_2(H_2 O)(SO_4)]^{+}$

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The complex(es),which can exhibit the type of isomerism shown by $[Pt(NH_3)_2 Br_2]$,is(are) [en $= H_2 NCH_2 CH_2 NH_2$ ]$(A)$ $[Pt(en)(SCN)_2]$$(B)$ $[Zn(NH_3)_2 Cl_2]$$(C)$ $[Pt(NH_3)_2 Cl_4]$$(D)$ $[Cr(en)_2(H_2 O)(SO_4)]^{+}$