question: As shown in the figure, if angle OBC = 40.0, then the degree of angle AOB is ()
  Choices:
  A:40°
  B:50°
  C:80°
  D:100°
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: As shown in the figure, if angle OBC = 40.0, then the degree of angle AOB is ()
  Choices:
  A:40°
  B:50°
  C:80°
  D:100°
query_cot: Please first conduct reasoning, and then answer the question and provide the correct option letter, e.g., A, B, C, D, at the end.
  Question: As shown in the figure, if angle OBC = 40.0, then the degree of angle AOB is ()
  Choices:
  A:40°
  B:50°
  C:80°
  D:100°
question_for_eval: As shown in the figure, if angle OBC = 40.0, then the degree of angle AOB is ()
  Choices:
  A:40°
  B:50°
  C:80°
  D:100°