Which of the following is a measure of biometrics performance which rates the ability of a system to correctly authenticate an authorized user?

A.
Failure to capture

B.
Type II

C.
Mean time to register

D.
Template capacity

Explanation:
Type II, or false acceptance rate (FAR), is the measure of the likelihood that the biometric security system will incorrectly accept an access attempt by an
unauthorized user.
Incorrect Answers:
A: Failure to capture refers to the probability that an automatic system fails to detect a biometric input when presented properly.
C: Mean time to register is not a valid option.
D: Template capacity refers to the maximum number of sets of data which can be stored in the system.

http://en.wikipedia.org/wiki/Biometrics