Consider the following statements.<br>1. The chain reaction process is used in nuclear bombs to release a vast amount of energy, but in nuclear reactors, there is no chain reaction.<br>2. In a nuclear reactor, the reaction is controlled, while in nuclear bombs, the reaction is uncontrolled.<br>3. In a nuclear reactor, all operating reactors are 'critical', while there is no question of 'critically' in case of a nuclear bomb.<br>4. Nuclear reactors do not use moderators, while nuclear bombs use them.<br>Which of the above statements about operational principles of a nuclear reactor and a nuclear bomb is/are correct?

Correct Answer: 2 and 3