question: In the figure above, the radii of four circles are 1, 2, 3, and 4, respectively. What is the ratio of the area of the small shaded ring to the area of the large shaded ring?
  Choices:
  A.1:2
  B.1:4
  C.3:5
  D.3:7
  E.5:7
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: In the figure above, the radii of four circles are 1, 2, 3, and 4, respectively. What is the ratio of the area of the small shaded ring to the area of the large shaded ring?
  Choices:
  A.1:2
  B.1:4
  C.3:5
  D.3:7
  E.5:7
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 above, the radii of four circles are 1, 2, 3, and 4, respectively. What is the ratio of the area of the small shaded ring to the area of the large shaded ring?
  Choices:
  A.1:2
  B.1:4
  C.3:5
  D.3:7
  E.5:7
question_for_eval: In the figure above, the radii of four circles are 1, 2, 3, and 4, respectively. What is the ratio of the area of the small shaded ring to the area of the large shaded ring?
  Choices:
  A.1:2
  B.1:4
  C.3:5
  D.3:7
  E.5:7