The arrangement of the following compounds:
i. Bromomethane
ii. Bromoform
iii. Chloromethane
iv. Dibromomethane
iii < i < iv < ii
iv > iii > i > ii
ii > iii > i > iv
i> ii > iii > iv
CH3–CI<CH3–Br<CH2Br2<CHBr3
Arrange the following in increasing acidic character Phenol, m - nitrophenol, m - chlorophenol, m - cresol I II III IV