The chemical shifts of CH3 and CH2 protons in a molecule are 1.15 and 3.35 ppm, respectively. When the magnetic field is 2 T, the absolute difference between the local magnetic fields (in T) for these two protons is
1
4.4 × 106
2
2.2 × 10-6
3
4.4 × 10-6
4
2.2 × 106