Three of these letter groups follow the same pattern. Which one is the odd one out: CEG, PRT, LNP, FHI?

💡 Solution & Explanation

In CEG, PRT, LNP, each letter is 2 places after the one before it (for example C = 3, E = 5, G = 7). In FHI the steps are 2 and 1, so it is the odd one out.