Which is the correct syntax to create an asmlib disk?

Which is the correct syntax to create an asmlib disk?
DISK1 = asmlib disk name
/dev/sdb1 = first device partition
/dev/sdb = device name

A.
/usr/sbin/oracleasmadddisk DISK1/dev/sdfa

B.
/usr/sbin/oracleasmcreatedisk DISK1/dev/sdb1

C.
/usr/sbin/oracleasmcreatedisk DISK1/dev/sdb

D.
/usr/sbin/oracleasm map DISK1/dev/sdb