कौन सा विकल्प \(A=\{1,2,3\}\) से \(B=\{x,y,z\}\) में एक वैध फलन को दर्शाता है?
Which option represents a valid function from \(A=\{1,2,3\}\) to \(B=\{x,y,z\}\)?
Explanation opens after your attempt
B. \({(1,x),(2,y),(3,z)}\)
Concept
In option (B), each of (1,2,3) appears exactly once as a first element. This identifies a valid function.
Why this answer is correct
The correct answer is B. \({(1,x),(2,y),(3,z)}\). In option (B), each of (1,2,3) appears exactly once as a first element. This identifies a valid function.
Exam Tip
विकल्प (B) में (1,2,3) प्रत्येक प्रथम अवयव के रूप में ठीक एक बार आया है। यही वैध फलन की पहचान है।
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