In the first pair, "BAR" is transformed into "RAB" by rotating the first letter 'B' to the last position.
Similarly, in the second pair, "CAR" should be transformed by rotating the first letter 'C' to the last position.
After rotating 'C', we get "RAC". Therefore, the correct answer is (c) RAC.
Arun’s present age in years is 40% of Barun’s. In another few years, Arun’s age will be half of Barun’s. By what percentage will Barun’s age increase during this period?