The correct answer is A. ROM.
ROM stands for Read-Only Memory. It is a type of non-volatile memory that is used to store permanent data. ROM is programmed at the time it is manufactured and cannot be changed after that. It is used to store the basic instructions that a computer needs to start up.
RAM stands for Random-Access Memory. It is a type of volatile memory that is used to store data that is currently being used by the computer. RAM can be changed at any time, and it is erased when the computer is turned off.
PROM stands for Programmable Read-Only Memory. It is a type of non-volatile memory that can be programmed once. PROM is used to store data that needs to be changed infrequently, such as the BIOS.
EPROM stands for Erasable Programmable Read-Only Memory. It is a type of non-volatile memory that can be erased and programmed multiple times. EPROM is used to store data that needs to be changed frequently, such as the configuration settings for a computer.
None of the above is not a correct answer.