In the bromination of methane, the free radical CH$_3\!\cdot$ is formed. One termination step in this reaction is the creation of C$_2$H$_6$ when two free radicals combine. What could be formed in a termination step during the bromination of propane?
- A1, 2 and 3
- B1 and 2 only
- C2 and 3 only
- D1 only