question: As shown in the figure, and the area of the shaded part in the figure is ()
  Choices:
  A:πcm²
  B:\frac{2}{3}πcm²
  C:\frac{1}{2}cm²
  D:\frac{2}{3}cm²
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, and the area of the shaded part in the figure is ()
  Choices:
  A:πcm²
  B:\frac{2}{3}πcm²
  C:\frac{1}{2}cm²
  D:\frac{2}{3}cm²
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, and the area of the shaded part in the figure is ()
  Choices:
  A:πcm²
  B:\frac{2}{3}πcm²
  C:\frac{1}{2}cm²
  D:\frac{2}{3}cm²
question_for_eval: As shown in the figure, and the area of the shaded part in the figure is ()
  Choices:
  A:πcm²
  B:\frac{2}{3}πcm²
  C:\frac{1}{2}cm²
  D:\frac{2}{3}cm²