In which of the following compounds cation and anion size ratio is minimum?

In which of the following compound size of cation to anion ratio is minimum?

In which of the following compounds does the ratio of anion size to cation size has the maximum value?

Which of the following compounds has the lowest anion to cation size ratio ?

In which of the following compounds does the ratio of anion to cation size have the lowest value?

In which of the following compounds does the ratio of anion to cation size have the lowest value?

In which of the following compounds does the ratio of the anion size to the catton size have the lowest value?

Which of the following has minimum values of cation-anion size ratio ?