A) \[C{{l}_{2}}\] and \[B{{r}_{2}}\]are evolved
B) \[C{{l}_{2}}\]is evolved
C) \[C{{l}_{2}},\ B{{r}_{2}}\]and \[{{F}_{2}}\]are evolved
D) None of these
Correct Answer: D
Solution :
Upper halogen can replace lower halogen from their compounds solution.
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