किस विकल्प में f फलन है लेकिन एक-एक होना जरूरी नहीं दिखाता?
Which option shows f is a function but not necessarily one-one?
Explanation opens after your attempt
A. {(1,a),(2,a),(3,c)}
Concept
1 and 2 have the same image a, yet every input has only one value. Therefore it is a function.
Why this answer is correct
The correct answer is A. {(1,a),(2,a),(3,c)}. 1 and 2 have the same image a, yet every input has only one value. Therefore it is a function.
Exam Tip
1 और 2 का समान प्रतिबिंब a है, फिर भी हर इनपुट का केवल एक मान है। इसलिए यह फलन है।
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