Select the option that is related to the third letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster. CDAF : XWZU :: DEFC : ?
Every letter corresponds to its reverse letter as per the alphabetical series. For example, A is written as Z, B is written as Y, C is written as X and so on. So, CDAF is written as XWZU Similarly, DEFC is written as WVUX in the same manner.