Four diatomic species are listed below in different sequences. Which of these represents the correct order of their increasing bond order?

Options

A. `O_2^- lt NO lt C_2^2- ltHe_2^+`
B. `NO lt C_2^2- lt O_2^-- ltHe_2^+`
C. `C_2^2- lt He_2^+ lt NO ltO_2^-`
D. `He_2^+ lt O_2^- lt NO lt C_2^2- `