Which of the following is an example of a false negative?

A.
The IDS does not identify a buffer overflow.

B.
Anti-virus identifies a benign application as malware.

C.
Anti-virus protection interferes with the normal operation of an application.

D.
A user account is locked out after the user mistypes the password too many times.

Explanation:
With a false negative, you are not alerted to a situation when you should be alerted.