उस विकल्प का चयन कीजिए जो पांचवें अक्षर-समूह से उसी प्रकार संबंधित है जैसे चौथा अक्षर-समूह तीसरे अक्षर-समूह से संबंधित है और दूसरा अक्षर-समूह पहले अक्षर-समूह से संबंधित है। OPQ : RST :: HIJ : KLM :: GHI : ?

Which of the following letter-number clusters will replace the question mark (?) in the given series to make it logically complete? CAR78, GEV86, KIZ94, OMD102, ?

Refer to the following letter series and answer the question: (Left) A B E R F S Q B S Z S S A E H L V X Y (Right) How many vowels are there, each of which is immediately preceded by a vowel and also immediately followed by a consonant?