Math Chapter Wise Ordinary And Partial Differential Equations, Integral Equations And Calculus Of Variations English MCQ UP PCS (Pre) 2005 Q.Which of the following differential equation is linear: A2 dy x y y dx + = Bn dy sin x x y dx − = Cdy (1 y) P(x)y Q(x) dx + + = D2 dy y x y dx + = Show answer Correct answer: 2 dy x y y dx + =