Which of the following molecule/species is having minimum number of lone pair on its central atom?

Which have maximum number of lone pair on central atom :-

The number of lone pair on central atom in ClF_3

Molecule having maximum number of lone pairs of electrons on central atom

The ion with maximum number of lone pairs on the central atom is-

In which of the following molecules maximum number of lone pairs is present on the central atom ?

Which of the following compounds contains the maximum number of lone pairs at the central atom in its best Lewis structure?