In a certain code language, CAR is written as ECT, DOG is written as F

In a certain code language, CAR is written as ECT, DOG is written as FQI and SUN is written as UWP. What is the code word for BET ?

DHU
EGV
CFU
DGV
This question was previously asked in
UPSC CISF-AC-EXE – 2021
The code word for BET is DGV.
This is a letter coding problem where a specific rule is applied to convert the letters of a word into a code. By analyzing the given examples, we can identify the transformation rule.
Let’s look at the positional values of the letters in the English alphabet (A=1, B=2, … Z=26).
CAR -> ECT
C(3) -> E(5) : +2
A(1) -> C(3) : +2
R(18) -> T(20) : +2
The rule is to shift each letter forward by 2 positions in the alphabet.

Let’s verify with the other examples:
DOG -> FQI
D(4) -> F(6) : +2
O(15) -> Q(17) : +2
G(7) -> I(9) : +2 (Consistent)

SUN -> UWP
S(19) -> U(21) : +2
U(21) -> W(23) : +2
N(14) -> P(16) : +2 (Consistent)

Applying the +2 rule to BET:
B(2) -> D(4)
E(5) -> G(7)
T(20) -> V(22)
The resulting letters are D, G, and V.
So, the code word for BET is DGV.