Correct Answer:
D. Brain
The correct answer is Brain. "Brain" is widely considered the first computer virus specifically designed for IBM PC compatible computers. It was created in 1986 by two Pakistani brothers, Basit and Amjad Farooq Alvi. The virus spread via floppy disks, infecting the boot sector of the disk. Their intention was reportedly to protect their medical software from piracy. Brain demonstrated how malicious code could self-replicate and spread between personal computers, marking a significant point in the history of cybersecurity threats for PCs.
Let's examine why the other options are incorrect:
- Melissa: Melissa was a fast-spreading macro virus that emerged much later in 1999. It specifically targeted Microsoft Word documents and spread through email, causing widespread disruption, but it was not the first PC virus.
- Trojan: A Trojan horse is a type of malicious software that disguises itself as legitimate software. It's a category of malware that deceives users into running it, rather than a specific first virus name. While early malicious programs existed, "Trojan" is a general classification, not a specific pioneer virus for PCs.
- Creeper: Creeper is often cited as the first computer worm, created in the early 1970s on ARPANET. While it was a self-replicating program, it predates personal computers and the concept of a "virus" in the context of infecting host files or boot sectors of PCs. For PC viruses, Brain is the generally accepted first.