The hydrogen bomb is based upon

The correct option is B

nuclear fusion

Explanation

1. A simple model of a hydrogen bomb consists of two sections. A primary section and a secondary section.
2. The secondary part of the hydrogen bomb causes the most destruction.
3. The reaction that occurs here is the nuclear fusion reaction.
4. The primary part of the bomb nuclear fission occurs.
5. This produces sufficient temperature to start the nuclear fusion reaction in the secondary section.

Hence, the correct option is (b)