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Which nodes should be selected for installation of surveillance cameras?

3, 6 and 7
3, 1 and 4
2, 5 ,1 and 4
None of these

Correct Answer: 2, 5 ,1 and 4

Explanation:

On the basis of above given question ,we can say that
Similar to the above answer cameras are put on 2, 5, 1 and 4 to minimize the cost.

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