The jogging track in a sports complex is 726 metres in circumference. Deepak and his wife start from the same point and walk in opposite directions at 4.5 km/hr and 3.75 km/hr respectively. They will meet for the first time in `4. 9\ m in` b. `5. 5\ m in` c. `5. 28\ m in` d. `6\ m in`