Methane and bromine undergo free radical substitution. P and Q take part in the reaction mechanism. P and Q: • act as reactants in propagation steps • act as reactants in termination steps What could P and Q be?
- ABr and H
- BBr and $\text{CH}_3$
- CBr and $\text{C}_2\text{H}_6$
- D$\text{CH}_3$ and $\text{CH}_3\text{Br}$