Q3. Which of the following statements is/are true of nuclear fission?
1. For the nuclear fission process to be self-sustaining, at least one neutron from each fission event must go on to split another nucleus.
2. If more than one neutron from each nuclear fission event causes another fission event, the process dies out and the reaction is said to be subcritical.
3. A fission bomb operates by suddenly combining two subcritical masses of fissionable material to form a supercritical mass.
a. 3 only
b. 1 and 3
c. 1 only
d. 2 and 3
e. 2 only