Correct option is B
A. Payload → III: A Payload is the part of a malware (like a virus or worm) that performs a malicious action, such as deleting files, corrupting data, or sending information without consent. It is the harmful component delivered after infection.
B. Worm → I: A Worm is a self-replicating program that spreads across networks without the need for a host file. It uses system vulnerabilities to propagate.
C. Phishing → II: Phishing is a form of cybercrime where attackers send fraudulent emails that appear legitimate to trick users into providing sensitive data like usernames, passwords and credit card numbers.
D. Spamming → IV: Spamming refers to sending unsolicited messages, typically in bulk, over email or messaging platforms. These are usually commercial in nature and unwanted by the recipient.