Hybridisation states of $C$ in $CH_3^+$ and $CH_4$ are

Which statement is correct about $CO_2$ if the central atom uses $s + P_x$ orbitals in hybridization?
$(i)$ $\pi$ bond will be formed by $P_y$ and $P_z$
$(ii)$ molecule can be in $XY$ plane
$(iii)$ molecule can be in $XZ$ plane
$(iv)$ molecule can be in infinite plane
$(v)$ molecule can be in $YZ$ plane
Correct code is:

Which of the following molecules has a central atom that adopts $sp^2$ hybridization?

In which one of the following species does the central atom have a type of hybridization that is not the same as that present in the other three?

For which of the following hybridisation is the bond angle maximum?

Order of the bond strength of $C-H$ bonds involving $sp, sp^2$ and $sp^3$ hybridized carbon atoms is