Explanation:

- The code language assigns numbers to letters based on their position in the alphabet.

- 'R' is 18 and 'A' is 1, so RA = 18 + 1 = 19. 'F' is 6 and 'E' is 5, so FE = 6 + 5 = 11. 246 is the concatenation of these results: 19 -> 2 & 11 -> 46.

- 'A' is 1 and 'B' is 2, so AB = 1 + 2 = 3. 'J' is 10 and 'C' is 3, so JC = 10 + 3 = 13. 115 is the concatenation: 3 -> 1 & 13 -> 15.

- Applying this logic to 'AC + BD':

- 'A' is 1 and 'C' is 3, making AC = 1 + 3 = 4.

- 'B' is 2 and 'D' is 4, making BD = 2 + 4 = 6.

- Combined, it forms 4 -> 04 & 6 -> 37.

Therefore, the correct option is:

- Option:4, 37

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