In the context of computers, which one among the following can replicate itself ?

A Worm is a standalone malware computer program that replicates itself in order to spread to other computers. Unlike a virus, it does not need to attach itself to an existing program or require human intervention to spread; it uses computer networks to find and exploit vulnerabilities in other systems.

• Trojan horse: A malicious program that misleads users of its true intent by appearing legitimate. It does not self-replicate.
• Ransomware: Malware that encrypts a victim's files and demands a ransom. While some modern versions (like WannaCry) include worm-like spreading capabilities, self-replication is the defining characteristic of a worm.
• Spyware: Software designed to gather data about a person or organization and send it to a third party without consent; it typically does not replicate itself.