A molecule with the formula \({\mathrm{AX}}_{4}\mathrm{Y}\) has all it's elements from p-block. Element A is rarest, mon…

A molecule with the formula \({\mathrm{AX}}_{4}\mathrm{Y}\) has all it's elements from p-block. Element A is rarest, monoatomic, non-radioactive from its group and has the lowest ionization enthalpy value among A, X and Y. Elements X and Y have first and second highest electronegativity values respectively among all the known elements. The shape of the molecule is