The correct answer is A. Byte.
A byte is a group of eight bits that is used to represent a single character or number in a computer. It is the smallest addressable unit of memory in most computer architectures.
A word is a group of bits that is used to represent a number or value in a computer. The size of a word varies from computer to computer, but it is typically 16, 32, or 64 bits.
A record is a group of fields that is used to represent a single entity in a database. A field is a single piece of data, such as a name, address, or phone number.
A file is a collection of records that is stored on a disk or other storage device. Files can be used to store data, programs, or other information.
E is not the correct answer because it is not a valid option.