Find the odd letter (vowel vs consonant): Pick the one that is not a vowel.

Introduction / Context:
Odd-one-out items in verbal reasoning often rely on a single linguistic attribute that splits a small set cleanly. In English alphabets, letters are grouped into vowels and consonants; this binary is stable and widely taught, making it a reliable separator.

Given Data / Assumptions:

• A: vowel
• E: vowel
• I: vowel
• M: consonant

Concept / Approach:
Use the vowel–consonant classification. If three are vowels and one is a consonant (or vice versa), the singleton defines the outlier.

Step-by-Step Solution:

Verification / Alternative check:
Cross-check pronunciation and standard school lists of vowels (A, E, I, O, U). “M” is not in that set.

Why Other Options Are Wrong:
They belong to the vowel set and therefore are not the outlier.

Common Pitfalls:
Avoid confusing sometimes-vowel “Y”; it is not present here and does not affect this classification.

Final Answer:
M