Which of the following is a false statement about 'Zero-Day Angle' exploit during Penetration testing?

This type of attack often represents a highly advanced organization.

It recreates a protocol or application and attempts to send data at the application.

This attack is possible due to countermeasure technology.

There should be some countermeasures and the relevant operating system to perform such exploit.

Zero-day angle exploit is often a last resort for most penetration testers.