Official Answer Key & Detailed Solution
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Correct Answer: Option (D) — 1, 2 and 3
Concept & Option Breakdown
Standard Reference VerifiedBiometric identifiers include physiological characteristics (fingerprints, iris, retina, face, hand geometry) and behavioral characteristics (voice, keystroke dynamics, gait). Statement 1 is correct: Iris scanning uses infrared illumination to capture the complex, unique patterns of the iris. Statement 2 is correct: Retinal scanning maps the unique capillary blood vessel pattern in the retina at the back of the eye. Statement 3 is correct: Voice recognition analyzes vocal tract geometry and acoustic characteristics to verify an individual's identity.
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