Which of the following is not a primary biometric authentication?

Which of the following is not a primary biometric authentication?

• Body scanner
• Voice
• Fingerprint
• Iris pattern 

 

EXPLANATION

Body scanners are soft biometrics. Soft biometrics traits are physical, behavioral or human characteristics that have been derived from the way human beings normally distinguish their peers (such as height, gender, and hair color). They are used to complement the identity information provided by the primary biometric identifiers .
https://en.wikipedia.org/wiki/Biometrics#Soft_biometrics