Pick out the wrong statement ?

A. Nitrogen in presence of steam decor-burises high carbon steel, whereas hydrocarbon gases

B. Active nitrogen (formed by cracking ammonia at the metal surface) cause nitride formation

C. burise the surface of steel at annealing temperatures

D. h increase in surface hardness

E. None of these

F. Addition of methane to the furnace atmosphere reduces decarburising by hydrogen

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