Question

Identify the collection which are a set.

• A. The collection of airports in India
• B. The collection of four best novels from Harry Potter series
• C. A collection of novels written by Rabindranath Tagore
• D. Collection of all chapters from the unit Algebra

Answer 1

Answer: (A), (C), (D)

Collection of all chapters from the unit Algebra

Sets are the well defined collection of objects.
Here, collection of things defined by the adjectives like "best, easiest, hardest etc." are not considered as sets, as they are not well defined.

So, "Collection of four best novels from harry potter series" is not a set.

Now, if we consider "Collection of airports in India, collection of novels written by rabindranath tagore, collection of chapters from the unit Algebra", can be written in form of sets as they are well defined.