Task: Question Answering
Input (English): Question: Two cyclist start on a circular track from a given point but in opposite direction with speeds of 7m/s and 8m/s. If the circumference of the circle is 630meters, after what time will they meet at the starting point?

 Option A: 20sec

 Option B: 15sec

 Option C: 42sec

 Option D: 50sec

 Option E: 1min
Output (English): Option C