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     EduGorilla 
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    When we add silicon to cast iron,

    I.          ductility of cast iron is improved
    II.         fluidity of the molten metal is increased
    III.        formation of graphite flake is promoted
    IV.        formation of graphite module is promoted

    Options :-

    1. I and IV
    2. II and III
    3. II and IV
    4. I and II
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