A byte is a group of
A. \[16bits\]
B. \[8bits\]
C. \[32bits\]
D. \[4bits\]

Hint: A byte is a unit of data that is eight binary digits long. A byte is the unit most computers used to represent a character such as a letter or number. Bits are working as true or false in Boolean algebra. When the value is 1 it means it is true and when the value is 0 then it means false. Many programming languages like C/C++ define bytes as an addressable unit of data storage large enough to hold any member of the basic character set of execution.

Complete answer:
Bits: A bit is the smallest unit of measurement used to quantify the computer data. It contains a single binary value of 0 or 1.
A byte is a unit of digital information that consists of 8bits. A byte is a unit of measurement of the size of the digital storage on a computer. Byte told us how many characters a computer holds.
There are some more relation of bytes
 $1byte = 8bits$
 $1kilobyte = 1024bytes$
 $1megabyte = 1024kilobytes$
 $1megabyte = 1024kilobytes$
 $1gigabyte = 1024megabytes$
 $1terrabyte = 1024gigabytes$
So the answer is (B) \[8bits\].

Note: There are every relation except bit to byte is equal to 210. The highest memory for computer memory is yottabyte which is equal to 1024 zettabytes. These are the units of measurement of storage of data. It represents the logical state. In early days some computers used 6bits as 1bytes. The unit symbol for the byte was designated as the upper-case letter by the ‘B’.