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                                    2).steel contains- (a) Fe+C+Mn (b) Fe+Mn+Cr (c) Fe+Mn (d) Fe+Mn+Ni | 
                            
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Answer»  Explanation: Steel is an alloy of iron and carbon containing less than 2% carbon and 1% manganese and small amounts of SILICON, phosphorus, SULPHUR and OXYGEN. Steel is the world's most important ENGINEERING and construction material.  | 
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