Task: Question Answering
Input (English): Question: A person travelled from his house to office at 45km/hr and office to house at 55km/hr. Then find the average speed?

 Option A: 49km/hr

 Option B: 49.5km/hr

 Option C: 50km/hr

 Option D: 50.5km/hr

 Option E: 51km/hr
Output (English): Option B