In the following triads, each group of letters is related to the subsequent one following a certain logic. Select from the given options, the one which follows the same logic.

NEST - ESNT - TSEN

GONE - ONGE - ENOG

Given: 

NEST - ESNT - TSEN

GONE - ONGE - ENOG

Logic: Position of letters are interchanged.

For, NEST - ESNT - TSEN

For, GONE - ONGE - ENOG

Similarly,

​LIES - IELS - SEIL​

Thus, correct option is (a).