How many $sp^{2}$ and $sp-$ hybridised carbon atoms are present respectively in the following compound?

Consider the following reactions:
$(i)$ $PCl_3 + 3H_2O \to H_3PO_3 + 3HCl$
$(ii)$ $SF_4 + 3H_2O \to H_2SO_3 + 4HF$
$(iii)$ $BCl_3 + 3H_2O \to H_3BO_3 + 3HCl$
$(iv)$ $XeF_6 + 3H_2O \to XeO_3 + 6HF$
Then according to given information the incorrect statement is

Carbon atoms in the compound $(CN)_4C_2$ are

With which of the given pairs does $CO_2$ resemble in terms of structure?

The hybridisation present in $C_2H_2$ is

In which of the following changes is there no change in the hybridisation of the central atom?