In which of the following pairs of molecules/ions, both the species are not likely to exist?

Options

A. `H_(2)^(-) , H_(2)^(2+)`
B. `H_(2)^(+) , He_(2)^(2-)`
C. `H_(2)^(-) , He_(2)^(2-)`
D. `H_(2)^(2+)`, He_(2)`

Answer

D

Explanation

Both `H_(2)^(2+) and He_(2)` have zero bond order and hence
do not exist .