If in a certain language PROSE is coded as PPOQE, how is LIGHT coded in that code?

Question

If in a certain language PROSE is coded as PPOQE, how is LIGHT coded in that code?

1. A. LIGFT
2. B. LGGHT
3. C. LGGFT (Correct answer)
4. D. LLGFE

Correct Answer

Option C — LGGFT

Detailed Solution & Explanation

The correct answer is LGGFT.

Key Points

• Compare PROSE with its code PPOQE, letter by letter:
  • P → P (unchanged), R → P (-2), O → O (unchanged), S → Q (-2), E → E (unchanged)
• The rule is therefore: the 2nd and 4th letters move back by two places; all other letters stay as they are.
• Applying it to LIGHT: L stays, I → G, G stays, H → F, T stays.
• The code is L-G-G-F-T = LGGFT.

Additional Information

• Note that in PROSE the unchanged letters happen to be the vowels and the first letter, but the reliable rule is positional — 2nd and 4th — which is what carries over to LIGHT.
• Always verify a proposed rule against every letter of the given pair before applying it.