Explanation:

- Sentence Context:

The state of the old college building is being described as run-down.

- Underlined Word:

"Derelict" indicates neglect and a state of disrepair.

- Option 1: Preserved for historical value

This suggests care and maintenance, the opposite of "derelict."

- Option 2: Unsafe for occupation

While it might be true for a "derelict" building, it doesn't fully capture the meaning of neglect.

- Option 3: Neglected and broken down

This accurately describes "derelict," emphasizing neglect and deterioration.

- Option 4: Retaining its original beauty

This is the opposite of "derelict," indicating maintenance and preservation.