If ROBUST is coded as QNATRS in a certain language, which word will be coded as ZXCMP?

AYDNQ

The correct answer is Option (2) → AYDNQ

In the given code:

ROBUST → QNATRS

Each letter is shifted one step backward in the English alphabet:

• R → Q
• O → N
• B → A
• U → T
• S → R
• T → S

So the rule is: each letter −1.

Now decode ZXCMP by shifting each letter one step forward:

• Z → A
• X → Y
• C → D
• M → N
• P → Q

This gives AYDNQ.

Correct Answer: AYDNQ