\(यदि (A={1,2,3,4,5}) और (R={(a,b):a+b\) is prime}) है, तो (R) के बारे में कौन सा कथन सही है?
\(If (A={1,2,3,4,5}) and (R={(a,b):a+b\) is prime}), which statement about (R) is correct?
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Correct Answer
A. सममित लेकिन स्वतुल्य नहींSymmetric but not reflexive
Concept
The sum does not change when order changes, so it is symmetric. But ((4,4)) is absent because (8) is not prime.
Why this answer is correct
The correct answer is A. सममित लेकिन स्वतुल्य नहीं / Symmetric but not reflexive. The sum does not change when order changes, so it is symmetric. But ((4,4)) is absent because (8) is not prime.
Exam Tip
योग क्रम बदलने से नहीं बदलता, इसलिए सममित है। पर ((4,4)) नहीं है क्योंकि (8) अभाज्य नहीं है।
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