Which of the following biometric access controls has the HIGHEST rate of false negatives?

Iris recognition is generally considered one of the most accurate biometric methods, with a very low false negative rate, as the iris pattern is highly unique and stable.

Fingerprint scanning is a widely used and relatively accurate biometric method, with lower false negative rates than face recognition, though factors like cuts or dirt can affect it.

Retina scanning is highly accurate, often more so than fingerprint scanning, due to the unique and stable pattern of blood vessels at the back of the eye, resulting in a very low false negative rate.

Face recognition typically has the highest rate of false negatives (False Rejection Rate - FRR) among the listed options because its accuracy can be significantly affected by numerous variable factors such as lighting conditions, camera angle, facial expressions, aging, use of accessories (glasses, hats), and even minor changes in appearance. These variations can cause the system to fail to recognize a legitimate user.