यदि \(A=\{{1,2},3,4\}\) है तो निम्न में से कौन (A) का उपसमुच्चय नहीं है?
If \(A=\{{1,2},3,4\}\), which of the following is not a subset of (A)?
Explanation opens after your attempt
D. ({1,2})
Concept
In (A), ({1,2}) is one element, but (1) and (2) are not separate elements. So ({1,2}) is not a subset.
Why this answer is correct
The correct answer is D. ({1,2}). In (A), ({1,2}) is one element, but (1) and (2) are not separate elements. So ({1,2}) is not a subset.
Exam Tip
(A) में ({1,2}) एक अवयव है पर (1) और (2) अलग से अवयव नहीं हैं। इसलिए ({1,2}) उपसमुच्चय नहीं है।
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