Computer Sciences > GATE 2014 SET-1 > Graph Theory
An ordered n-tuple (d1, d2,..., dn) with d1 ≥ d2 ≥... ≥ dn is called graphic if there exists a simple undirected graph with n vertices having degrees d1, d2,..., dn respectively. Which of the following 6-tuples is NOT graphic?
A
(1, 1, 1, 1, 1, 1)
B
(2, 2, 2, 2, 2, 2)
C
(3, 3, 3, 1, 0, 0)
D
(3, 2, 1, 1, 1, 0)

Correct : c

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