In a GSM architecture, which system stores the IMEI numbers of all working mobile phones under the network?

In a GSM architecture, which system stores the IMEI numbers of all wo

1.	In a GSM architecture, which system stores the IMEI numbers of all working mobile phones under the network?
A.	HLR
B.	VLR
C.	EIR
D.	AUC
Answer» D. AUC