नीचे दिए गए पांच अक्षरों में से चार किसी न किसी प्रकार से समान हैं और इसलिए वे अपना एक समूह बनाते हैं। इनमें से कौन सा उस समूह से संबंधित नहीं है? L, H, N, X, Y

Based on the alphabetical order, three of the following four are alike in a certain way and thus form a group. Which is the one that does not belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter cluster)

Based on the English alphabetical order, three of the following four letter-cluster pairs are alike in a certain way and thus form a group. Which is the one that does not belong to that group? (Note: The odd one out is not based on the number of consonants/vowels or their position in the letter-cluster.)