Match the nuclear reaction to its description.

Below are the matches between the nuclear reactions in Column A and their descriptions in Column B:

1. **Forms two lighter nucleus:** **a. Fission**
2. **Forms one heavier nucleus:** **b. Fusion**
3. **cb794d20-2b7f-4bf4-a043-964706757c9a:** (This appears to be an identifier and not descriptive; further context needed for a match.)
4. **808ecb1f-d7df-46f5-9d92-076db0dd74a0:** (This appears to be an identifier and not descriptive; further context needed for a match.)
5. **Has been successfully used to generate energy:** **a. Fission** (primarily used in nuclear power plants)
6. **Has NOT been successfully used to generate energy/electricity:** **b. Fusion** (while it has great potential, practical energy generation has not yet been achieved)

For items 3 and 4, please provide additional descriptions or context to make a match.