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On (A={\varnothing,{1},{2},{1,2}}), (R={(X,Y):X\subset Y\text{ or }X\cap Y=X}). What is the correct conclusion about (R)?

Answer and explanation

Correct answer: It is reflexive

Step 1: On the diagonal, (X\subset X) is false. Step 2: But (X\cap X=X) is true. Step 3: In the or condition, the second part includes every ((X,X)), so the relation is reflexive.

Related tags

Reflexive RelationSet OperationOr ConditionRelations And FunctionsMathematicsClass 12 Mcq

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