Write structure of A, B C and D in the following eactin sequence :
`{:(CH_(3)COCl overset(H_(2)//Pd-BaSO_(4))toA overset("dil. NaOH")toB overset(Delta)toC),(" "darrCH_(3)MgBr//H_(3)O^(+)),(" "D):}`
(b) Arrange the following compounds in the increasing order of their boiling points :
`CH_(3)CHO, CH_(3)CH_(2)OH,CH_(3)OCH_(3),CH_(3)COOH`

Explanation

(a)
(b) Increasing order of their boiling points : `CH_(5)OCH_(3)ltCH_(3)CHOltCh_(3)CH_(2)OHltCH_(3)COOH`