In odd-one-out questions, check for a common property such as letter type, number, or order. The option that breaks the pattern is usually the correct answer.
Step 1: Identify the pattern in the options.
We observe that the given options consist of groups of three letters. We need to check whether they follow a common pattern or rule. Step 2: Analyze each option. (A) AEI: All the letters are vowels. (B) EUO: All the letters are vowels. (C) UOF: This group contains the letter F, which is a consonant, while the other two letters are vowels. (D) IOE: All the letters are vowels. Step 3: Conclusion.
Options (A), (B), and (D) consist only of vowels, whereas option (C) contains a consonant. Hence, option (C) does not follow the same pattern and is the odd one out.