Answer: Option (B) is the correct answer.
Explanation:
When a large nuclei divides into small nuclei then this process is known as fission.
Fission reaction is similar to a decomposition reaction because in a decomposition reaction also there is splitting of a compound into different atoms or ions.
For example, decomposition reaction for compound [tex]CaCl_{2}[/tex] will be as follows.
[tex]CaCl_{2} \rightarrow Ca^{2+} + 2Cl^{-}[/tex]
Whereas fusion process is a process where two small nuclei combine together to form a larger nuclei.
Fusion is similar to synthesis reaction because in a synthesis reaction two atoms combine together to result in the formation of a compound.
For example, synthesis reaction for water is as follows.
[tex]2H^{+} + O_{2}(g) \rightarrow H_{2}O[/tex]
Therefore, we can conclude that fission is a decomposition reaction while fusion is a synthesis reaction.
