BEIJING (Reuters) - WPP (WPP.L: Quote , Profile , Research ), the world's No. 2 advertising and marketing firm, said on Monday that German market researcher GfK (GFKG.DE: Quote , Profile , Research ) was misleading the market about its intentions to acquire British rival Taylor Nelson Sofres (TNS.L: Quote , Profile , Research ).

WPP has made its own $2.2 billion offer in cash and shares ...