Which letter group is the odd one out: CEG, GIK, MOQ, RTW?

Explanation

1. 01

   In CEG, GIK and MOQ each letter is two places after the one before it (C, skip D, E, skip F, G).

2. 02

   In RTW, R→T is 2 places but T→W is 3 places, so RTW is the odd one out.