The two conversions shown here are as follows. $\text{NH}_4^{+} \rightarrow \text{NH}_3$ $\text{C}_2\text{H}_4 \rightarrow \text{C}_2\text{H}_6$ What common characteristic is shared by these two conversions?
- Aa lone pair of electrons in the product
- Bchange in oxidation state of an element
- Cdecrease in bond angle of the species involved
- Ddisappearance of a $\pi$ bond