$Q5$ Linear differential equation is
$Oo53$ $A$ $-A$ A differential equation in which all derivatives are in first order
$B$ $-A$ A differential equation in which the dependent variable and their derivatives are in first degree
$C$ $A$ A differential equation in which the dependent variable and their derivatives are in first degree and are $-$ multipled
$D$ $→$ O None of the above
$2$