Which of the following is not an example of primary memory?

Magnetic tape is a secondary storage medium accessed sequentially, not part of primary memory.

RAM is primary memory that holds running programs and data temporarily.

ROM is primary memory storing permanent instructions like the boot routine.

Cache memory is a fast primary store sitting between the processor and main memory.

Primary memory is directly reachable by the processor while secondary memory is not.

Magnetic tape is mainly used for backup and archival storage.