The correct option is C Deport
Option C, Deport is the word for the given phrase 'To send an unwanted person out of the country'. Option A, 'Exclude' means to deny access to a group, or a place. Option B, 'Obstracise' means to exclude someone from the society or group. Option D 'Expatriate' is a person who lives outside his native country. Thus, options A, B and D are incorrect options and the correct word for the given phrase is option C, Deport.