यदि \(A\subseteq C\) और \(B\subseteq D\) है, तो कौन सा संबंध निश्चित रूप से सही है?
If \(A\subseteq C\) and \(B\subseteq D\), which relation is definitely true?
Explanation opens after your attempt
Correct Answer
A. \(A\times B\subseteq C\times D\)
Concept
Every \(a\in A\) lies in (C), and every \(b\in B\) lies in (D), so \((a,b)\in C\times D\). In exams, check membership of both coordinates separately.
Why this answer is correct
The correct answer is A. \(A\times B\subseteq C\times D\). Every \(a\in A\) lies in (C), and every \(b\in B\) lies in (D), so \((a,b)\in C\times D\). In exams, check membership of both coordinates separately.
Exam Tip
हर \(a\in A\) के लिए \(a\in C\) और हर \(b\in B\) के लिए \(b\in D\), इसलिए \((a,b)\in C\times D\)। परीक्षा में दोनों निर्देशांकों की सदस्यता अलग जांचें।
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