Which of the following are sets? Justify your answer.
$A$ collection of the most dangerous animals of the world.

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(N/A) set is defined as a well-defined collection of objects.
The collection of the most dangerous animals of the world is not a well-defined collection because the criteria for determining the 'dangerousness' of an animal can vary from person to person.
Since the criteria are subjective,this collection is not a set.

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