Task: Question Answering
Input (English): Question: A boat goes 100 km downstream in 10 hours, and 75 m upstream in 15 hours. The speed of the stream is?

 Option A: 8 2 ½ kmph

 Option B: 2 7 ½ kmph

 Option C: 6 2 ½ kmph

 Option D: 2 2 ½ kmph

 Option E: 2 3 ½ kmph
Output (English): Option D