question: In the triangle, two acute angles are 45 and 30 degrees. One of a right-angle side is bisected by a line from the top vertex. Find x.
  Choices:
  A:4
  B:4 \sqrt { 2 }
  C:4 \sqrt { 3 }
  D:8
query_wo: Please directly answer the question and provide the correct option letter, e.g., A, B, C, D.
  Question: In the triangle, two acute angles are 45 and 30 degrees. One of a right-angle side is bisected by a line from the top vertex. Find x.
  Choices:
  A:4
  B:4 \sqrt { 2 }
  C:4 \sqrt { 3 }
  D:8
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 triangle, two acute angles are 45 and 30 degrees. One of a right-angle side is bisected by a line from the top vertex. Find x.
  Choices:
  A:4
  B:4 \sqrt { 2 }
  C:4 \sqrt { 3 }
  D:8
question_for_eval: In the triangle, two acute angles are 45 and 30 degrees. One of a right-angle side is bisected by a line from the top vertex. Find x.
  Choices:
  A:4
  B:4 \sqrt { 2 }
  C:4 \sqrt { 3 }
  D:8