In addition to fingerprint scanning, which of the following can be used in the biometric identification of a person? 1. Iris scanning 2. Retinal scanning 3. Voice recognition Select the correct answer using the code given below.
- (a) 1 only
- (b) 2 and 3 only
- (c) 1 and 3 only
- (d) 1, 2 and 3 ✓ UPSC's answer
Why the answer is (d)
• Biometric identification uses unique physiological or behavioural traits: iris patterns (1, used in Aadhaar), retinal blood-vessel patterns (2), and voice prints (3), besides fingerprints, face and gait.
• All three are established biometric methods.
• Hence 1, 2 and 3, option (d).
Why the other options are wrong
- (a) 1 only
- Retinal scanning and voice recognition are also biometrics.
- (b) 2 and 3 only
- Iris scanning is also a biometric.
- (c) 1 and 3 only
- Retinal scanning is also a biometric.
Asked in the GS Paper I of the UPSC Civil Services Preliminary Examination 2014, held on 24 August 2014. Question and answer key: Union Public Service Commission. Explanation: UPSC Answer Check.