Which of the following special symbol allowed in a variable name?
A * (asterisk)
B | (pipeline)
C - (hyphen)
D _ (underscore)
Correct Option - D
ExplainationVariable names in C are made up of letters (upper and lower case) and digits. The underscore character ("_") is also permitted. Names must not begin with a digit. Examples of valid (but not very descriptive) C variable names: => foo => Bar => BAZ => foo_bar => _foo42 => _ => QuUx