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Ubuntu - Disk - Delete a partition

Before deleting a partition, run the following command to list the partitions:

sudo fdisk -l

returns:

Disk /dev/sda: 1.84 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: CT2000MX500SSD1 
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: gpt
Disk identifier: 2300B8B9-F7DD-4E5C-B2EF-84A5EC8D5D66
 
Device          Start        End    Sectors  Size Type
/dev/sda1        2048    1050623    1048576  512M EFI System
/dev/sda2     1050624 2098202623 2097152000 1000G Linux LVM
/dev/sda3  3727806464 3728855039    1048576  512M EFI System
/dev/sda4  3728855040 3907028991  178173952   85G Linux filesystem
 
 
Disk /dev/sdb: 14.57 TiB, 16000900661248 bytes, 31251759104 sectors
Disk model: ST16000NM001G-2K
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
 
 
Disk /dev/sdc: 14.57 TiB, 16000900661248 bytes, 31251759104 sectors
Disk model: ST16000NM001G-2K
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes