How many of the following statements are correct?
A)  Nitriles are selectively reduced by diisobutyl aluminum hydride, to imines followed by hydrolysis to give aldehydes  
B) In Etards reaction chromyl chloride$\left(Cr{O}_{2}C{l}_2\right)$  oxidizes methyl group to a chromium complex.
C) Phenyl or vinyl to the carboxylic acid, increases the acidity of corresponding carboxylic acid
D) Butan-2-ol and butan-1-ol can be differentiated by  $\left(I_2+NaOH\right)$

E) Propanal and propanone can be differentiated by 2, 4-DNP test