You are given a statement written in Bengali. Choose the most logical word from the given 4 options which can be used to replace the <MASK> token in the statement . Output the word from the correct option .

Statement: ১৯২৪: The Turkish Grand National Assembly abolishes the Ottoman <MASK> and sends the remaining members of the Ottoman House into exile in a move that begins the extensive de-Islamization of the public sphere in Turkey.

 Option A: Ankara

 Option B: Malaysia

 Option C: Iraq

 Option D: Caliphate
Caliphate