कौन सा नियम हमेशा सही है?
Which rule is always true?
Explanation opens after your attempt
A. \(A\cup B=B\cup A\)
Concept
The order of sets does not change the union. This is the commutative law of union.
Why this answer is correct
The correct answer is A. \(A\cup B=B\cup A\). The order of sets does not change the union. This is the commutative law of union.
Exam Tip
संघ में समुच्चयों का क्रम बदलने से उत्तर नहीं बदलता। इसे संघ का क्रमविनिमेय नियम कहते हैं।
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