Which of the following has $sp^3$ hybridization?

The compounds with $sp^2$ hybridized central atom among the following are:
$(A)$ $H_2CO_3$
$(B)$ $SiF_4$
$(C)$ $BF_3$
$(D)$ $HClO_2$

Suggest reasons why the $B-F$ bond lengths in $BF_3\ (130\ pm)$ and $BF_4^-\ (143\ pm)$ differ.

Which of the two ions from the list given below have the geometry that is explained by the same hybridization of orbitals: $NO_2^-$,$NO_3^-$,$NH_2^-$,$NH_4^+$,$SCN^-$?

The number of lone pairs of electrons and the hybridization of Xenon $(Xe)$ in $XeOF_2$ are

Which of the following is an incorrect relation based on Bent's rule?