Which of the following is NOT an example of secondary storage?

A. SD card
B. Cache
C. DVD
D. Floppy diskette
E. Tape drive

B. Cache

Explanation: Cache is part of the primary memory system, which is designed to store frequently accessed data temporarily for quick retrieval. The other options (SD card, DVD, floppy diskette, and tape drive) are all examples of secondary storage devices. Hence, B is the correct answer.