In which set are all the molecules arranged so that all their atoms lie in a single plane?
- A$\text{AlCl}_3$, $\text{BF}_3$, $\text{PH}_3$
- B$\text{AlCl}_3$, $\text{CO}_2$, $\text{NH}_3$
- C$\text{BF}_3$, $\text{C}_2\text{H}_4$, $\text{C}_3\text{H}_6$
- D$\text{C}_2\text{H}_4$, $\text{CO}_2$, $\text{H}_2\text{O}$