The logic follows here is:- The given words are weight measurements. When they are arranged in ascending order of the weight are 5. Nanogram 1. Microgram 3. Milligram 4. Gram 2. Kilogram So, logical and meaningful order is 5, 1, 3, 4, 2. Hence, the correct answer is "5, 1, 3, 4, 2".