question: In the figure, a regular polygon is within in a circle. Find the measure of a central angle.
  Choices:
  A:30
  B:60
  C:90
  D:120
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: In the figure, a regular polygon is within in a circle. Find the measure of a central angle.
  Choices:
  A:30
  B:60
  C:90
  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: In the figure, a regular polygon is within in a circle. Find the measure of a central angle.
  Choices:
  A:30
  B:60
  C:90
  D:120
question_for_eval: In the figure, a regular polygon is within in a circle. Find the measure of a central angle.
  Choices:
  A:30
  B:60
  C:90
  D:120