Respuesta :
The duke has written a history of his castle.
Her cannot be correct, because then it wouldn't be a duke (he is a man), it would be a duchess (the female form of duke).
Their refers to more than one person, and here we have only one duke.
Its refers to either children or non-humans.
Her cannot be correct, because then it wouldn't be a duke (he is a man), it would be a duchess (the female form of duke).
Their refers to more than one person, and here we have only one duke.
Its refers to either children or non-humans.