The bond having the minimum bond energy is

Identify the correct thermal stability orders among the following:
$(a) BeSO_4 < MgSO_4 < CaSO_4 < SrSO_4 < BaSO_4$
$(b) HF > H_2O > NH_3 > CH_4$
$(c) NH_3 > PH_3 > AsH_3 > SbH_3$
$(d) LiCl > BeCl_2 > BCl_3 > CCl_4$
$(e) Na_2CO_3 > MgCO_3 > Al_2(CO_3)_3$
$(f) Li_2CO_3 < Na_2CO_3 < K_2CO_3 < Rb_2CO_3 < Cs_2CO_3$

Statement $(A)$ $CO_2$ has no dipole moment,whereas $SO_2$ and $H_2O$ have dipole moment.
Statement $(B)$ $SnCl_2$ is ionic,whereas $SnCl_4$ is covalent.
Which of the following is correct?

The number of electrons in the valence shell of the central atom of a molecule is $8$. The molecule is

The strongest $P-O$ bond is found in the molecule

Which of the following statement$(s)$ is/are correct?