Match the following associated with a nuclear reactor?
| Elements | Working |
|---|---|
| 1. Graphite | a. Coolant |
| 2. Liquid sodium | b. Shield |
| 3. Cadmium | c. Moderator |
| 4. Heavy steel and concrete | d. Control rod |
1
1-c, 2-a, 3-d, 4-b
2
1-d, 2-a, 3-c, 4-b
3
1-c, 2-b, 3-d, 4-a
4
1-a, 2-c, 3-b, 4-d