Select the option that is related to third letter

Solution

The logic followed here is: The 1st and 3rd letters are interchanged 4th and 6th letters are interchanged, then immediately succeeding letter is written for all the odd place letters as per the English Alphabetical series and remaining letters remain as it is. For SATURN: S         A         T          U         R         N T          A         S         N         R         U U         A         T          N         S         U         Code for SATURN is UATNSU For NATURE: N         A         T          U         R         E T          A         N         E         R         U U         A         O         E         S         U Code for NATURE is UAOESU For HORROR: H         O         R         R         O         R R         O         H         R         O         R S         O         I           R         P         R Code for HORROR is SOIRPR