A. chlorine attacks the starch to give the blue-black color
B. chlorine attacks the iodide ion to give the blue-black color
C. chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color
D. iodine attacks the starch to give the blue-black color
Correct Answer: Option C
C. chlorine oxidizes the iodide ion to produce iodine which attacks the starch to give the blue-black color
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