Answer: Option (c) is the correct answer.
Explanation:
When two small or light atomic nuclei combine together then it results in the formation of a larger nuclei.This process is known as nuclear fusion.
For example, [tex]^{2}_{1}H + ^{3}_{1}H \rightarrow ^{4}_{2}He + ^{1}_{0}n + Energy[/tex]
Whereas when a larger atomic nuclei splits into two small atomic nuclei then it is known as a nuclear fission.
For example, [tex]^{235}_{92}U + ^{1}_{0}n \rightarrow ^{90}_{36}Kr + ^{143}_{56}Ba + 3^{1}_{0}n[/tex]
Thus, we can conclude that the end result of a nuclear fusion reaction is one new atom with a larger nucleus.