In terms of the order of acceptance, which of the following technologies is the LEAST accepted?

A.
Fingerprint

B.
Iris

C.
Handprint

D.
Retina patterns

Explanation:
The order of acceptance has slightly changed in the past years. It was Iris that was the most accepted
method three years ago but today we have Voice Pattern that is by far the most accepted. Here is
the list from most accepted first to least accepted at the bottom of the list:
Voice Pattern
Keystroke pattern
Signature
Hand geometry
Handprint
Fingerprint

Iris
Retina pattern