Which of the following is NOT a form of communication used in interviewing techniques?

The correct choice highlights that "illegal" does not represent a legitimate form of communication used in interviewing techniques. In interviewing, communication channels are essential for the exchange of information between the interviewer and interviewee. Non-verbal communication includes body language, facial expressions, and gestures that can provide additional context to the spoken words. Verbal communication is the direct exchange of spoken words, which is fundamental during interviews. Symbolic communication involves using symbols or representations to convey messages or ideas, often seen in various cultures.

The presence of "illegal" suggests a connotation that does not fit within recognized forms of communication. It does not align with the established categories of communication that can be used effectively in interviews. Understanding these legitimate forms of communication is crucial for conducting successful interviews and gathering accurate information.