# Which of the following is in the correct order of decreasing size?

giga, mega, nano

Explanation

Each prefix represents a multiple of 10. The smallest prefix common to electronics is pico which is $$10^{-12}$$ and the largest common prefix is tera which is $$10^{12}$$ .The correct order by decreasing size is : tera, giga, mega, kilo, milli, micro, nano, pico which makes giga, mega, nano the correct answer.