In the question, two Quantities I and II are given. You have to solve both the Quantities to establish the correct relation between Quantity-I and Quantity-II and choose the correct option. Quantity-I: The ratio of the speed of a bus to a car is 5:4. The speed of the bike is 12 kmph more than the speed of the car. The time taken by the car to travel a distance of 'D' km and by the bus to travel a distance of (D + 15) km is the same. If the sum of the speed of the bus and the bike is (D + 6) km/h, then find the time taken by the bike to travel a distance of 9D km. Quantity-II: Pipes P, Q, R and S can fill a tank alone in 10, 15, 20 and 30 hours respectively. Pipes P and R together fill the tank for 1 hour, pipes Q and S together fill the tank for the next 1 hour, and finally, pipes R and S together fill the tank for another 1 hour. This process is repeated in the same order till the tank gets filled. Find the total time taken by them to fill the tank.