`{:(,"Column I",,"Column II"),((a),[Pt(NH_(3))ClBrI]^(-),(p),"Square planar"),((b),[Pt(NH_(3))ClBrNO_(2)]^(-),(q),EAN=84),((c),[Pt(NH_(3))Cl(CN)_(2)]^(-),(r),"Linkage isomers are 3"),(,,(t),"Linkage isomers are 4"):}`

Answer

(a-p,q);(b-p,q,s);(c-p,q,r);(d-p,q,t)

Explanation

EAN=78-2+8=84. All `Pt^(2+)` complexes are square planar
(b) `NO_(2)`,-ONO (Linkage)
(c ) (C,C), (C,N),(N,N) (Linkage)
(d) `C_(3),C_(2),N,CN_(2),N_(3)` (Linkage)