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If chromatic number of a line graph is 4 then the chromatic index of the graph will be?(a) 0(b) 1(c) 4(d) information insufficientThis question was posed to me during an interview.The doubt is from Graph Coloring in section Graph Coloring of Data Structures & Algorithms II

Answer» CORRECT CHOICE is (c) 4

For explanation: The chromatic index of a graph is always equal to the chromatic number of its LINE graph. So the chromatic index of the graph will be 4.


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