Explanation:

- In the code language, each letter is shifted by +3 positions in the alphabet.

- 'HOPE' becomes 'KRSH' by shifting H to K, O to R, P to S, and E to H.

- Similarly, 'RAGF' becomes 'UDJI' by shifting R to U, A to D, G to J, and F to I.

Now, let's apply this to 'MNCK':

- M becomes P (M+3)

- N becomes Q (N+3)

- C becomes F (C+3)

- K becomes N (K+3)

Given the options:

1. PQEM

2. PQFN

3. PQEN

4. PQFM

The correct transformed word from 'MNCK' is PQFN.