Which of the following is known as a set of entities of the same type that share same properties, or attributes?

Explanation: n entity set is a collection of entities that share the same characteristics or attributes. Think of it as a group of similar things.

For example, if we're talking about a university database, an entity set could be "Students". All students share common attributes like student ID, name, address, etc.

So, the correct answer is c) Entity set.