Question

If in a certain code MONKEY is written as ZFLOPN, then in the same code how is CHARACTER written?

• A. SFUDBSCID
• B. SFUDBEBID
• C. SFUBIDDBS
• D. SFUDBSBID

Hint:

When a sample code looks irregular, test simple transformations like \emph{reverse} and a uniform alphabet shift (\(+1\), \(-1\), etc.).

Answer 1

The Correct Option is D

Rule from the example.
MONKEY \(\rightarrow\) ZFLOPN: Reverse the word and shift each letter one ahead in the alphabet. 
Check: \(\text{MONKEY} \xrightarrow{\text{reverse}} \text{YEKNOM} \xrightarrow{+1} \text{ZFLOPN}\). 

Apply to CHARACTER.
\[ \text{CHARACTER} \xrightarrow{\text{reverse}} \text{RETCARAHC} \xrightarrow{+1} \text{S F U D B S B I D}. \] Thus the code is \(\boxed{\text{SFUDBSBID}}\).

Answer 2

Instead of reversing the word first and then shifting, let's shift every letter forward by one first and reverse the result afterward — the two operations commute, so this order should give an independent check on the same rule.

Shift each letter of \(\text{CHARACTER}\) forward by one: \[ C{\to}D,\ H{\to}I,\ A{\to}B,\ R{\to}S,\ A{\to}B,\ C{\to}D,\ T{\to}U,\ E{\to}F,\ R{\to}S, \] giving \(\text{DIBSBDUFS}\). Reversing this string end-to-end produces \(\text{SFUDBSBID}\).

1. Option SFUDBSCID: This has a \(C\) where the shift-and-reverse produces a \(B\) (the seventh letter from the left, corresponding to the shifted \(A\)), so it doesn't match.
2. Option SFUDBEBID: This has an \(E\) in a slot where the derived string has \(S\) (from the shifted, reversed \(R\)), so it's wrong.
3. Option SFUBIDDBS: The letters here are out of order compared to \(\text{SFUDBSBID}\), so this doesn't match the derived string.
4. Option SFUDBSBID: This matches the shift-then-reverse result letter for letter.

Shifting first and reversing afterward reproduces exactly the same coded word.

Hence, the correct answer is SFUDBSBID.