The correct answer is Cluster virus.A cluster virus is a form of computer virus that ties its own execution to that of other software programs.These viruses usually work by altering directory or registry entries so that when a user runs an application, the virus also runs.The Dir-2 virus is one well-known example of a cluster virus. Because of some of its inherent defenses, this virus is frequently referred to as a "stealth" virus.Important PointsPolymorphic virus:Polymorphic viruses are file infectors that spread through spam and infected websites. They are complicated and difficult to detect.They infect the system with morphing or modified version of the existing program while keeping the original code.Macro virus:A macro virus is a computer virus that is built in the same macro language that is used by software programs like Microsoft Excel and word processors like Microsoft Word.When a macro virus infects a software program, it causes a series of operations to be initiated automatically when the program is launched.Boot Sector virus:It's a virus that infects floppy discs' boot sector or hard drives' Master Boot Record (MBR).The Boot sector contains all of the files required to launch the computer's operating system.The virus either replaces the existing application or transfers itself to a different location on the hard drive.Download Solution PDFShare on Whatsapp