Choose the world that is different from rest in each group by circling A, B, C or D

Choose the world that is different from rest in each group by circling A, B, C or D
Question 1:   A. ill   B. sick   C.sad    D. unwell
Question 2:   A. doctor   B. nurse     C. dentist      D.teacher
Question 3:   A. hall      B. bedroom     C. gate      D. kitchen
Question 4:   A. hair      B. nose      C. head      D. body
Question 5:   A. coughing ho     B. sneezing     C. disease     D. runny nose