The correct answer is B. Criminal.
A hoodlum is a violent or disorderly person, especially a young man who belongs to a gang. A pioneer is a person who is the first to explore or settle in a new area. A devotee is a person who is devoted to a particular person, activity, or cause. A scholar is a learned person, especially one who is an expert in a particular subject.
A hoodlum is a synonym for a criminal because both are people who break the law. A pioneer is not a synonym for a hoodlum because a pioneer is someone who explores or settles in a new area, while a hoodlum is someone who breaks the law. A devotee is not a synonym for a hoodlum because a devotee is someone who is devoted to a particular person, activity, or cause, while a hoodlum is someone who breaks the law. A scholar is not a synonym for a hoodlum because a scholar is a learned person, while a hoodlum is someone who breaks the law.