यदि \(A\subseteq B\) और \(B'\subseteq C\), तो कौन सा कथन (A') के बारे में सदैव सही है?
If \(A\subseteq B\) and \(B'\subseteq C\), which statement about (A') is always true?
Explanation opens after your attempt
Correct Answer
A. \(B'\subseteq A'\)
Concept
From \(A\subseteq B\), taking complements gives \(B'\subseteq A'\). The second condition is not needed for this conclusion.
Why this answer is correct
The correct answer is A. \(B'\subseteq A'\). From \(A\subseteq B\), taking complements gives \(B'\subseteq A'\). The second condition is not needed for this conclusion.
Exam Tip
\(A\subseteq B\) से पूरक लेने पर \(B'\subseteq A'\) मिलता है। दूसरी शर्त इस निष्कर्ष के लिए आवश्यक नहीं है।
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