In which set are all the molecules arranged so that all their atoms lie in a single plane?
- A$\mathrm{AlCl_3}$, $\mathrm{BF_3}$, $\mathrm{PH_3}$
- B$\mathrm{AlCl_3}$, $\mathrm{CO_2}$, $\mathrm{NH_3}$
- C$\mathrm{BF_3}$, $\mathrm{C_2H_4}$, $\mathrm{C_3H_6}$
- D$\mathrm{C_2H_4}$, $\mathrm{CO_2}$, $\mathrm{H_2O}$