Which of these is not malicious software?

A.
Phishing

B.
Spyware

C.
Virus

D.
Worm

Explanation:
Phishing is a form of Internet fraud. Typically the victim will receive an email asking him or her to check or confirm an account with a bank or service provider. Sometimes instant messaging is used and even telephone contact has been tried. It is difficult to catch up with the perpetrators of phishing. Internet users have to remain particularly vigilant and must never respond to an email request to transfer money or submit personal (financial) information, such as bank account numbers, PIN codes or credit card details.