Four letter-cluster have been given out of which three are alike in some manner, while one is different. Choose the odd one.
Answer & explanation
Correct answer: option 4
PIOUS - There are three vowels ( O , I , U)
AEONS - There are three vowels ( O ,A , E)
QUAIL - There are three vowels ( U , I , A)
PENAL - There are two vowels ( E , and , A ) (This is odd)