यदि \(A-B=\varnothing\) और \(B-C=\varnothing\) है, तो कौन-सा निष्कर्ष सही है?
If \(A-B=\varnothing\) and \(B-C=\varnothing\), which conclusion is correct?
Explanation opens after your attempt
A. \(A\subseteq C\)
Concept
\(A-B=\varnothing\) gives \(A\subseteq B\), and \(B-C=\varnothing\) gives \(B\subseteq C\). Therefore \(A\subseteq C\).
Why this answer is correct
The correct answer is A. \(A\subseteq C\). \(A-B=\varnothing\) gives \(A\subseteq B\), and \(B-C=\varnothing\) gives \(B\subseteq C\). Therefore \(A\subseteq C\).
Exam Tip
\(A-B=\varnothing\) से \(A\subseteq B\) और \(B-C=\varnothing\) से \(B\subseteq C\) मिलता है। इसलिए \(A\subseteq C\)।
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