In a certain language TRIANGLE is written as VTKCPING. How RECTANGLE…

The correct answer is option 3: TGEVCPING

TRIANGLE → VTKCPING

Compare letters:

T → V (+2)
R → T (+2)
I → K (+2)
A → C (+2)
N → P (+2)
G → I (+2)
L → N (+2)
E → G (+2)

So the rule is: each letter shifts forward by 2 positions in the alphabet.

Now apply the same rule to RECTANGLE:

R → T
E → G
C → E
T → V
A → C
N → P
G → I
L → N
E → G

So the code becomes: T G E V C P I N G