A person wants to travel a distance of 50km by his bicycle. He travels with a speed of 12.5 km/hr. After every 12.5 km, he takes a rest of 20 minutes. How much time will he take to complete the whole distance?

• A. 4hrs 20 min                
• B. 5hrs 20 min
• C. 5hrs                
• D.          6hrs