What is called the percentage of valid subjects that are falsely rejected by a Biometric Authentication system? 

Answer options:

A. False Rejection Rate (FRR) or Type I Error
B. False Acceptance Rate (FAR) or Type II Error
C. Crossover Error Rate (CER)
D. True Rejection Rate (TRR) or Type III Error A

Explanation

The percentage of valid subjects that are falsely rejected is called the False Rejection Rate (FRR) or Type I Error. Source: KRUTZ, Ronald L. & VINES, Russel
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 38.