Which of the following is NOT an example of a crime against national security?

The correct answer is theft, as it does not directly pertain to national security. Crimes against national security typically involve actions that threaten the state or its fundamental operations, such as espionage, violation of neutrality, and treason.

Espionage involves spying or gathering confidential information to harm a nation’s security interests. Violation of neutrality refers to actions that undermine a country's position in international conflicts or treaties, thereby affecting its national security. Treason is defined as acts that betray one's country, usually through war or aiding its enemies.

In contrast, theft is a general criminal offense that primarily involves the unlawful taking of someone else's property, which does not inherently threaten the state's overall safety or security. This distinction clearly identifies theft as unrelated to national security concerns.