Question: How many undirected graphs (not necessarily connected) can be constructed out of a given set V = {v 1 , v 2 , ... v
How many undirected graphs (not necessarily connected) can be constructed out of a given set V = {v1, v2, ... vn} of n vertices?
A. n(n-1)/
B. 2n
C. n!
D. 2n(n-1)/2
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