Step 1: Understanding the Question:
We are given a word and its code. We need to work backwards from a given code ("HKTG") to find the original word.
Step 2: Detailed Explanation:
Decoding the logic of WATER:
W (23) $\rightarrow$ Y (25) : (+2)
A (1) $\rightarrow$ C (3) : (+2)
T (20) $\rightarrow$ V (22) : (+2)
E (5) $\rightarrow$ G (7) : (+2)
R (18) $\rightarrow$ T (20) : (+2)
The logic is a shift of +2 for each letter.
Finding the word for HKTG: Since the code is obtained by adding 2, the original word is obtained by subtracting 2 from each letter of the code.
H (8) - 2 = 6 $\rightarrow$ F
K (11) - 2 = 9 $\rightarrow$ I
T (20) - 2 = 18 $\rightarrow$ R
G (7) - 2 = 5 $\rightarrow$ E
Step 3: Final Answer:
The original word is "FIRE". This corresponds to option (A).