In virtual storage, program segments stored on disk during processing are called:

tracks
blocks
pages
sectors E. None of the above

The correct answer is C. pages.

A page is a logical unit of data that is stored in virtual memory. Pages are typically 4096 bytes in size, but this can vary depending on the operating system. When a program is loaded into memory, its pages are loaded from disk into physical memory. The pages that are currently being used by the program are kept in RAM, while the pages that are not being used are kept on disk. This allows the operating system to manage memory more efficiently.

Tracks are concentric circles on a disk. Blocks are sectors on a track. Sectors are the smallest unit of data that can be read or written on a disk.

E is not the correct answer because pages are the logical unit of data that is stored in virtual memory.