It might be D considering the location.
The Troubles (Irish: Na Trioblóidí) is the common name for the ethno-nationalist conflict in Northern Ireland<span> during the late 20th century. Also known internationally as the </span>Northern Ireland conflict<span>, it is sometimes ..... It was proscribed on both </span>sides<span> of the border and remained ideologically committed to overthrowing both ...</span>
I believe the incorrect statement is A.
The territory of a duke or duchess is called a Duchy.