Pick out the wrong statement ?

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

B. None of these

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

D. h increase in surface hardness

E. burise the surface of steel at annealing temperatures

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

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