Q:

Select the option that is related to the fifth letter-cluster in the same way as the second letter-cluster is related to the first letter-cluster and the fourth letter-cluster is related to the third letter-cluster.
GAVE : AGEV :: KEPT : EKTP :: ACID : ?

• 1
  CIAD
• 2
  CAID
• 3
  ACDI
• 4
  CADI