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Given answer is 2, I think it should be 3: F,A, and G are articulation points. Please check

in Graph Theory 326 views
3 articulation pts A G F
ya 3 is right ans

2 Answers

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Best answer
F, A and G are articulation points.

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why D or E not articulation point  ?
If removal of any vertex disconnects the graph that is articulation point or cut vertex

removing vertex F or A or G disconnects the graph so its articulation points

Removing D or E does not disconnects the graph.
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A vertex in an undirected connected graph is an articulation point (or cut vertex) iff removing it (and edges through it) disconnects the graph 

Graph is having 3 articulation point F ,A &  G

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