GATE | GATE CS 1999 | Question 15

The number of articulation point of the following graph is:

(A) 0
(B) 1
(C) 2
(D) 3

Answer: (D)

Explanation: An articulation point is a vertex whose removal makes the graph disconnected.
There are three articulation points in the given graph, they are vertices- 2, 3, and 5
If any one of the above nodes is removed from the graph then the graph becomes disconnected.

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