Biometric identification involves the use of unique physical or behavioral characteristics of a person to verify their identity. Fingerprint scanning is one of the commonly used biometric identification techniques.

Iris scanning involves the use of a camera to capture a high-resolution image of the iris of the eye. The iris has a unique pattern of colors, and this pattern is used to verify the identity of a person.

Retinal scanning involves the use of a low-intensity light to capture an image of the blood vessels in the retina at the back of the eye. The pattern of blood vessels is unique to each individual and can be used to identify them.

Voice recognition involves analyzing the unique characteristics of a person`s voice, such as pitch, tone, and accent, to verify their identity.

Therefore, the correct answer is option 3, which includes iris scanning and voice recognition as the additional biometric identification techniques besides fingerprint scanning.