- AHN
- BDJ
- CHK
- DHJ
Step-by-Step Solution
The two letters move in opposite senses: the first advances 2 places and the second falls back 2. B (2) rises to D (4) while P (16) drops to N (14). Doing the same to F (6) and L (12) gives H (8) and J (10). 'HN' moves both letters forward, 'DJ' moves both backward, and 'HK' gets the first letter right but pulls the second back only 1 place.
Answer: D) HJ