Pick out the correct statement. (A) Hot worked materials are subjected to annealing to remove internal stresses (B) Annealing of steel hardens it slightly (C) Normalising of a material induces stresses (D) Tempering of a material improves ductility & toughness but reduces hardness & brittleness

Pick out the correct statement.
(A) Hot worked materials are subjected to annealing to remove internal stresses
(B) Annealing of steel hardens it slightly
(C) Normalising of a material induces stresses
(D) Tempering of a material improves ductility & toughness but reduces hardness & brittleness
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(D) Tempering of a material improves ductility & toughness but reduces hardness & brittleness
   
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