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B
binomial
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C
trinomial
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D
None of the above
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Solution
The correct option is A monomial Required sum =(x4−xy+2y2)+(−x4+xy+2y2) =x4−xy+2y2−x4+xy+2y2=[(x4+(−x4))]+(−xy+xy)+(2y2+2y2)=0+0+4y2=4y2 4y2 is a monomial and polynomial in y.
Hence option (a) is correct.