Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ UP PGT 2021 Q.If y = sin (log x), then which of the following is correct? A2 d y xy 0 dx + = B2 d y y 0 dx + = C2 d y dy x x y 0 dx + + = D2 d y dy x – x y 0 dx + = Show answer Correct answer: 2 d y dy x x y 0 dx + + =