The correct statement about ICI 5 and \({\rm{ICI}}_4^ -\) is:

ICI 5 is trigonal bipyramidal and \({\rm{ICI}}_4^ -\) is tetrahedral

ICI 5 is square pyramidal and \({\rm{ICI}}_4^ -\) is tetrahedral

ICI 5 is square pyramidal and \({\rm{ICI}}_4^ -\) is square planar

The correct statement about ICI₅ and \({\rm{ICI}}_4^ -\) is:

ICI₅ is trigonal bipyramidal and \({\rm{ICI}}_4^ -\) is tetrahedral

ICI₅ is square pyramidal and \({\rm{ICI}}_4^ -\) is tetrahedral

ICI₅ is square pyramidal and \({\rm{ICI}}_4^ -\) is square planar

Both are isostructural