Solve the problem.A graph with 9 vertices has an Euler path but no Euler circuit. The graph must have
A. 9 vertices of even degree.
B. 2 vertices of even degree and 7 vertices of odd degree.
C. 9 vertices of odd degree.
D. 2 vertices of odd degree and 7 vertices of even degree.
E. none of these
Answer: D
Mathematics
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