चार अक्षर-समूह दिए गए हैं, जिनमें से तीन किसी न किसी तरह से एक समान हैं और एक भिन्न है। उस भिन्न अक्षर-समूह का चयन कीजिए।

Four letter-pairs are given below. The letters on the left side of (-) are related to the letters on the right side following a specific logic/rule. Three of them share the same rule. Select the odd one out.

Four letter-pairs are given. The letters on the left side of (-) are related to the letters on the right side of (-) by some logic. Three of them follow the same logic. Select the odd one out.