question: As shown in the figure, AB is the chord of circle O, OC perpendicular  AB and it intersects circle O at point C. Connect OA, OB, BC, if angle ABC = 25.0, then the size of angle AOB is ()
  Choices:
  A:80°
  B:90°
  C:100°
  D:120°
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, AB is the chord of circle O, OC perpendicular  AB and it intersects circle O at point C. Connect OA, OB, BC, if angle ABC = 25.0, then the size of angle AOB is ()
  Choices:
  A:80°
  B:90°
  C:100°
  D:120°
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, AB is the chord of circle O, OC perpendicular  AB and it intersects circle O at point C. Connect OA, OB, BC, if angle ABC = 25.0, then the size of angle AOB is ()
  Choices:
  A:80°
  B:90°
  C:100°
  D:120°
question_for_eval: As shown in the figure, AB is the chord of circle O, OC perpendicular  AB and it intersects circle O at point C. Connect OA, OB, BC, if angle ABC = 25.0, then the size of angle AOB is ()
  Choices:
  A:80°
  B:90°
  C:100°
  D:120°