In a certain code language, if EXTRNSIC is written as CIXESNRT, then how will
LEFTWING be written in the same code language?

Given, 

EXTRNSIC is written as CIXESNRT.

The pattern followed here is : 

• Last two alphabet of the given word will be written in reverse direction in the coded word.
• Then two alphabet of the given word from the starting is written in reverse direction in the coded word. 
• The process continued as above instruction. 

Similarly we apply same Pattern in the given word : LEFTWING 

It will be written as GNELIWTF. 

Hence, Option A is correct.