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If x(dy)/(dx) +y= (xf(xy))/(f'(xy)), the...

If `x(dy)/(dx) +y= (xf(xy))/(f'(xy))`, then `|f(xy)|` is equal to

A

`ke^(x^(2)//2)`

B

`ke^(y^(2)//2)`

C

`ke^(x^(2))`

D

`ke^(y^(2))`

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WB JEE PREVIOUS YEAR PAPER-QUESTION PAPER 2021-MULTIPLE CHOICE QUESTION
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