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Per the NPTEL lecture, an entity set is
Aa single, uniquely identifiable thing in the world
Bthe set of attributes describing one entity
Ca collection of entities all having the same properties
Dthe relationship between two distinguishable things
Answer & Solution
Correct answer: C. a collection of entities all having the same properties
An entity is one thing; an entity set is the collection of all such things sharing the same property shape. NPTEL: 'Entity Set or Entity Type: Collection of entities all having the same properties.' The other options confuse entity vs entity set, or mix in relationships.
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