Your answer: 2
Using GPT and creating fresh protective MBR.
Disk /dev/sda: 976773168 sectors, 465.8 GiB
Logical sector size: 512 bytes
Disk identifier (GUID): 5993DC25-B2CA-4364-BEAB-DFBAC1DE7408
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 976773134
Partitions will be aligned on 2048-sector boundaries
Total free space is 976773101 sectors (465.8 GiB)

Number  Start (sector)    End (sector)  Size       Code  Name