Select the most appropriate one-word substitution for the given group of words.
Someone taken a prisoner to fulfil demands

Correct option is D

The correct one-word for the given group of words is (d) hostage.
Hostage: Someone taken a prisoner to fulfill demands.
Meanings of other options:
• Dealer: a person or business that buys and sells goods.
• Guest: a person invited to visit someone's home or attend an event.
• Host: a person who receives or entertains other people as guests.