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.

DOW : WDO :: RAM : ?

MRA

DOW : WDO :: RAM : ?

The logic followed here is :

IN EACH SET

FIRST ALPHABET IS SHIFTED TO IIND PLACE

IIND ALPHABET IS SHIFTED TO IIIRD PLACE

IIIRD ALPHABET IS SHIFTED TO IIND PLACE

AS

DOW  BECOMES  WDO

SIMILARLY

RAM BECOMES  MRA