Task: Question Answering
Input (English): Question: A train overtakes two persons who are walking in the same direction to that of the train at 2 kmph and 4 kmph and passes them completely in 9 and 10 seconds respectively. What is the length of the train?

 Option A: 62 m

 Option B: 54 m

 Option C: 50 m

 Option D: 55 m

 Option E: 56 m
Output (English): Option C