Programs that come into a computer system disguised as something else, are called:

Correct option is A

Trojan horses are malicious programs that disguise themselves as legitimate software or useful files. Once installed, they can cause damage, steal information, or provide unauthorized access to the attacker. Unlike viruses, Trojan horses do not replicate themselves.
Information Booster:
1. Trojan horses appear harmless but carry malicious payloads.
2. They often rely on user interaction (e.g., downloading and installing) to cause harm.
Additional Knowledge:
· Viruses: Self-replicating programs that infect other programs.
· Web bugs: Small, often invisible, tracking tools used to monitor user activity.
· Zombies: Compromised computers controlled by attackers, often part of a botnet.