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What will be the chromatic number for a line graph having n vertices?(a) 0(b) 1(c) 2(d) nI had been asked this question in a national level competition.Asked question is from Graph Coloring in section Graph Coloring of Data Structures & Algorithms II

Answer»

Right option is (d) n

For EXPLANATION: A LINE graph of a SIMPLE graph is OBTAINED by connecting two vertices with an edge. A line graph has a chromatic number of n.



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