Which of the following is NOT a European Media Company?

Viacom is not a European media company; it is actually based in the United States. The company, known for its extensive portfolio of media and entertainment brands, operates mainly in the American market and has a significant global presence, but its headquarters and primary business operations are rooted in the U.S.

On the other hand, the BBC is a well-known British broadcaster, and the RTL Group operates numerous television and radio channels across various European countries. Mediaset is an Italian media company involved primarily in television and film production, making it distinctly European as well. This context clarifies why Viacom stands out as the correct choice in the context of the question regarding European media companies.