Which of the following is an example of nuclear fusion?

Formation of ${_{56}^{144}Ba}$ and ${_{36}^{89}Kr}$ from ${_{92}^{235}U}$ Formation of ${_{94}^{235}Pu}$ from ${_{92}^{235}U}$ Formation of ${_2^4He}$ from ${_1^2H}$ Formation of water from hydrogen and oxygen

Formation of ${_2^4He}$ from ${_1^2H}$

The correct answer is Option (3) → Formation of ${_2^4He}$ from ${_1^2H}$