A sentence has been given in Active/Passive Voice. Out of the four given alternatives, select the one which best expresses the same sentence inPassive/Active Voice.
A motorist knows four different routes from Jaipur to Bhangarh. From Bhangarh to Alwar he knows three different routes and from Alwar to Carlisle he knows two different routes. How many routes does he know from Jaipur to Carlisle?