A man arrives at a railway station 1 n 1/2 before the time at which he had ordered his carriage to meet him. He walks at the rate of 4kmph and meets the carriage 8kms from his house and reaches 1 HR earlier than usual time. What's the speed of the carriage and distance from the station to his house?
A. 8kmph,12km
B. 12kmph,16km
C. 4kmph,12km
D. None