Arjun Suresh (talk | contribs) |
Arjun Suresh (talk | contribs) |
||
| Line 12: | Line 12: | ||
Chromatic number of a graph is the minimum number of colors required to color all vertices such that no two adjacent | Chromatic number of a graph is the minimum number of colors required to color all vertices such that no two adjacent | ||
vertices are colored with same color. Since here we have no odd cycle, we can color whole graph with only $2$ colors, coloring the | vertices are colored with same color. Since here we have no odd cycle, we can color whole graph with only $2$ colors, coloring the | ||
| − | vertices with alternate colors. So option <b>(A)</b> is correct. | + | vertices with alternate colors. So, option <b>(A)</b> is correct. |
What is the chromatic number of an $n$ vertex simple connected graph which does not contain any odd length cycle? Assume $n > 2$.
(A) 2
(B) 3
(C) n-1
(D) n
Chromatic number of a graph is the minimum number of colors required to color all vertices such that no two adjacent vertices are colored with same color. Since here we have no odd cycle, we can color whole graph with only $2$ colors, coloring the vertices with alternate colors. So, option (A) is correct.
This work is licensed under the CC By-SA 3.0 , without all the cruft that would otherwise be put at the bottom of the page.
Sister Sites: GATE CSE Wiki, GATE CSE, Aptitude Overflow
GATECSE