Match the LIST-I with LIST-II and choose the correct answer from the options given below:
\[
\begin{array}{|l|l|}
\hline
\textbf{LIST I (Common powdery mildews)} & \textbf{LIST II (Causal organism)} \\
\hline
A.\ \text{Powdery mildews of barley} & I.\ \text{Cercosphaera leucotricha} \\
B.\ \text{Powdery mildews of peas} & II.\ \text{Uncinula necator} \\
C.\ \text{Powdery mildews of grape vines} & III.\ \text{Erysiphe polygoni} \\
D.\ \text{Powdery mildews of apple} & IV.\ \text{Erysiphe graminis var. hordei} \\
\hline
\end{array}
\]