- Step 1: Arrangement: A, C, B, D, E (1, 2, 3, 4, 5).
- Step 2: A in position 1, immediate right = position 2 = C.
- Step 3: Verify: C between A and B, satisfied.
- Step 4: Other arrangement invalid (D not at end).
- Step 5: Check options: Option (2) is C, which matches.
- Step 6: Ensure A's position and neighbor.