UPSC Prelims 2014 GS Paper I · Q66 of 100 General Science easy

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.

  1. (a) 1 only
  2. (b) 2 and 3 only
  3. (c) 1 and 3 only
  4. (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.

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