Coding And Decoding

Step 1: Observe the pattern in the code.
In the given code, the pattern involves reversing the letters in the word, swapping pairs of letters. For example: - "VISHWANATHAN" is written as "NAAWTHHSANIV". Similarly, "KARUNAKARANA" will follow the same pattern.

Step 2: Apply the pattern to KARUNAKARANA.
Following the pattern, we reverse and swap pairs of letters in "KARUNAKARANA", which results in "KAANRAURNAAK".

Step 3: Conclusion.
Thus, the correct answer is 1. KAANRAURNAAK.