Arrange the following methyl groups in the order of increasing delta values downfield from TMS in the 1H-NMR spectrum (lowest first).
6. Arrange the following methyl groups in the order of increasing δ values downfield from TMS in the 'H-NMR spectrum (lowest first). CH3-NH2 CH3-I CH3-OH CH3-Cl IV b) II,I, IV, III c) IV, II, III, I d) III, IV, II, I