question: Q:A 15-year-old boy is referred to a child psychologist because of worsening behavior and constant disruption in class. He has received multiple reprimands in the past 6 months for not doing the homework his teacher assigned, and he refuses to listen to the classroom instructions. Additionally, his teachers say he is very argumentative and blames other children for not letting him do his work. He was previously well behaved and one of the top students in his class. He denies any recent major life events or changes at home. His past medical history is noncontributory. His vital signs are all within normal limits. Which of the following is the most likely diagnosis?? 
  {'A': 'Antisocial personality disorder', 'B': 'Attention deficit hyperactivity disorder', 'C': 'Conduct disorder', 'D': 'Major depressive disorder', 'E': 'Oppositional defiant disorder'},