Under mark parity, each parity bit is?

Q.Under mark parity, each parity bit is?

A. Alternated between 0 and 1
B. Always set to 0
C. Always set to 1
D. Not used

Answer: C. Always set to 1

A parity bit, or check bit, is a bit added to a string of binary code to ensure that the total number of 1-bits in the string is even or odd. Parity bits are used as the simplest form of error detecting code.
A mark parity is a form of information data integrity check where the parity bit is always 1; otherwise, an error has occurred.