Match List I with List II.

List-I (Malware Type)		List-II (Definition)
A.	Polymorphic Virus	I.	A seemingly useful program that contains hidden harmful program code
B.	Metamorphic Virus	II.	Changes its signature with each copy made during replication
C.	Trojan Horse	III.	A malware that spreads copies of itself through a network without user interaction
D.	Worm	IV.	Completely rewrites itself each time it is replicated, sometimes changing its behaviour

Choose the correct option from the given below options:

Correct option is C

1. Polymorphic Virus: This virus type alters its code to avoid detection by antivirus programs. Each new copy of the virus behaves differently, making it difficult to detect based on known signatures.
2. Metamorphic Virus: Unlike polymorphic viruses, metamorphic viruses completely change their entire code on every replication, effectively avoiding detection by antivirus software.
3. Trojan Horse: This malware is disguised as a legitimate or useful software program. It performs harmful actions once executed, such as stealing data, corrupting files, or opening backdoors to systems.
4. Worm: Worms exploit network vulnerabilities to propagate across systems. They do not require user interaction, unlike viruses, and can spread widely in a short period, causing network congestion and security issues.