In allene $(C_3H_4)$,the type of hybridization of the carbon atoms is (are)

Which of the following species has a regular tetrahedral structure?

Is there any change in the hybridization of $B$ and $N$ atoms as a result of the following reaction? $BF_3 + NH_3 \to F_3B \cdot NH_3$

The hybridization of carbon in graphite and diamond is respectively ........

The number of species from the following in which the central atom uses $sp^3$ hybrid orbitals in its bonding is . . . . . . .
$NH_3, SO_2, SiO_2, BeCl_2, CO_2, H_2O, CH_4, BF_3$

The hybridisation and shape of $I_3^{-}$ ion,respectively,are