Which of the following is NOT a style of business communication?

The choice of "pretentious" is not recognized as a legitimate style of business communication. Business communication styles are typically characterized by their intent and audience. Direct communication is straightforward and to the point, avoiding ambiguity. Informal communication fosters a more casual and approachable tone, which can help build rapport and enhance relationships. Persuasive communication is aimed at convincing the audience to adopt a particular viewpoint or take a specific action.

In contrast, "pretentious" refers to an attempt to impress by using greater importance or merit than is actually possessed. This style would likely alienate the audience rather than engage or persuade them, making it inappropriate for effective business communication. In professional settings, it is crucial for communication to be clear, respectful, and appropriate to the context, rather than ostentatious or unnecessarily complex. This makes "pretentious" an unsuitable choice as a style of communication in the business context.