The memory which is programmed at the time it is manufactured is

The correct answer is C. PROM.

• RAM (Random Access Memory) is a type of computer memory that can be accessed randomly; that is, any byte of memory can be accessed without touching the preceding bytes. RAM is the most common type of memory found in computers and other devices, and it is used to store data and programs that are currently being used. RAM is volatile memory, which means that it loses its contents when the power is turned off.
• ROM (Read-Only Memory) is a type of computer memory that is permanently programmed at the time of manufacture. ROM is used to store essential system information, such as the BIOS, which is the basic input/output system that controls the computer’s hardware. ROM is non-volatile memory, which means that it retains its contents even when the power is turned off.
• PROM (Programmable Read-Only Memory) is a type of ROM that can be programmed once after it is manufactured. PROM is used to store data and programs that need to be changed infrequently, such as the firmware for a device. PROM is non-volatile memory.
• EPROM (Erasable Programmable Read-Only Memory) is a type of PROM that can be erased and reprogrammed multiple times. EPROM is used to store data and programs that need to be changed frequently, such as the configuration settings for a network device. EPROM is non-volatile memory.

In conclusion, the memory which is programmed at the time it is manufactured is C. PROM.