- Step 1: Constraint: T2 not in slot 4.
- Step 2: Arrangements: T4 or T3 in slot 4.
- Step 3: T2 explicitly cannot be in 4.
- Step 4: Check options: Option (2) is T2, which matches.
- Step 5: Verify: T1, T2, T3, T4 (T4 in 4), T1, T2, T4, T3 (T3 in 4).
- Step 6: Option (2) is correct.