Consider the parts of the nuclear reactor and their function:
| S.No | Parts of nuclear reactor | Function |
| 1. | U-235 | Control rods |
| 2. | Boron or Cadmium | Fuel rods |
| 3. | Molten Sodium | Coolant |
| 4. | Heavy Water | Moderator |
How many of the above pairs are correct?
1
One pair only
2
Two pairs only
3
Three pairs only
4
All pairs are correct