question_answer

The radius of the nucleus of an atom is about \[{{10}^{-15}}m\] and the radius of the observable universe is about \[{{10}^{23}}\,km\]. The ratio of these quantities is:

A)  \[1:{{10}^{41}}\]

B)  15 :23                  

C)  1: 38                     

D)         \[1:{{10}^{38}}\]