GATE CS 2025 Set 2 Q7 — General Aptitude

The coding pattern is obtained by reversing the letters of the given word and then shifting each letter forward by 1 position ($+1$ in alphabetical order).

Step 1: Verify with "IMAGE"

• Reverse of IMAGE is E G A M I.
• Shift each letter by $+1$:
  • $\text{E} \xrightarrow{+1} \text{F}$
  • $\text{G} \xrightarrow{+1} \text{H}$
  • $\text{A} \xrightarrow{+1} \text{B}$
  • $\text{M} \xrightarrow{+1} \text{N}$
  • $\text{I} \xrightarrow{+1} \text{J}$
• The resulting code is FHBNJ. This matches the given code.

Step 2: Verify with "FIELD"

• Reverse of FIELD is D L E I F.
• Shift each letter by $+1$:
  • $\text{D} \xrightarrow{+1} \text{E}$
  • $\text{L} \xrightarrow{+1} \text{M}$
  • $\text{E} \xrightarrow{+1} \text{F}$
  • $\text{I} \xrightarrow{+1} \text{J}$
  • $\text{F} \xrightarrow{+1} \text{G}$
• The resulting code is EMFJG. This matches the given code.

Step 3: Apply the pattern to "BEACH"

• Reverse of BEACH is H C A E B.
• Shift each letter by $+1$:
  • $\text{H} \xrightarrow{+1} \text{I}$
  • $\text{C} \xrightarrow{+1} \text{D}$
  • $\text{A} \xrightarrow{+1} \text{B}$
  • $\text{E} \xrightarrow{+1} \text{F}$
  • $\text{B} \xrightarrow{+1} \text{C}$
• The resulting code is IDBFC.

Therefore, the correct option is B.