What is the name of a database used mainly that stores information of a subscriber along with eligible services under roaming or another MSC area?

What is the name of a database used mainly that stores information of

1.	What is the name of a database used mainly that stores information of a subscriber along with eligible services under roaming or another MSC area?
A.	HLR
B.	VLR
C.	EIR
D.	AuC
Answer» C. EIR