Task: Question Answering
Input (English): Question: Two trains are traveling towards the same direction. First train is moving at speed of 100 km/hour and second train 200 km/hour.When will the head of first train start overtaking the second train.

 Option A: 2 hour

 Option B: 1 hour

 Option C: 2.5 hour

 Option D: 3.5 hour

 Option E: 4 hour
Output (English): Option C