Select the correct answer regarding "Linked Allocation" of disk blocks to files. 

File Allocation Table (FAT) is located on the disk volume and it is similar to the index block of Unix file system. 

Each block should contain a pointer to the next block as part of its data which causes multiple I/O operations to access the desired information in the file. 

The disk blocks must not be contiguous to allow them to be linked.

Linked Allocation suffers from both external fragmentation and internal fragmentation.