[PPSC Deputy Director, 2020]

48. Which of the following can be used as coolant in nuclear power reactors?
1. Light water

2. Heavy water
3. Carbon dioxide

4. Helium
 

Select the correct answer using the codes given below:

1. 1 and 2

2. 1 and 3

3. 3 and 4

4. All of these

Correct Answer :

All of these