यदि \(A\subseteq B\subseteq U\), तो कौन सा कथन सदैव सत्य है?
If \(A\subseteq B\subseteq U\), which statement is always true?
Explanation opens after your attempt
Correct Answer
A. \(B'\subseteq A'\)
Concept
Inclusion reverses when complements are taken. Thus \(A\subseteq B\) gives \(B'\subseteq A'\).
Why this answer is correct
The correct answer is A. \(B'\subseteq A'\). Inclusion reverses when complements are taken. Thus \(A\subseteq B\) gives \(B'\subseteq A'\).
Exam Tip
पूरक लेने पर समावेशन की दिशा उलट जाती है। इसलिए \(A\subseteq B\) से \(B'\subseteq A'\) मिलता है।
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