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How many unique colors will be required for vertex coloring of the following graph?

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in Data Structures & Algorithms II by (89.2k points)
How many unique colors will be required for vertex coloring of the following graph?

(a) 2

(b) 3

(c) 4

(d) 5

I got this question during an interview.

This key question is from Graph Coloring topic in section Graph Coloring of Data Structures & Algorithms II

1 Answer

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Correct option is (b) 3

The explanation is: The given graph will require 3 unique colors because two diagonal vertex are connected to each other directly. So its chromatic number will be 3.

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