a>b>c>d
d>b>c>a
a>c>b>d
a>d>b>c
Correct option is B. a>c>b>dSolution:- (B)a>c>b>dIn alkyl halides, polarity of C−X bond increases with increase in chain length.Hence the correct order of reaction with alcoholic KOH will be a>c>b>d