Which of the following refers to the first primary partition on the second SCSI hard disk within Linux?

a$.$ hda$1$

b$.$ sda$1$

c$.$ hda$2$

d$.$ sda$2$

e$.$ hdb$1$

f$.$ sdb$1$

g$.$ hdb$2$

h$.$ sdb$2$

e$.$ None of the above