Which of the following masses is the smallest? 400 milligrams 55 grams. 9 centigrams. 65 kilogram

To find the smallest mass, one has to convert all the values given from their respective units to gram.

So, 400 milligram = 0.4g

0.9 centigram = 0.009 g

0.65 kilogram = 650 g and we are also given 55 grams.

Out of all these values, the smallest one is 0.9 centigram.

Thus, the correct option is C.