Given below are two statements:

Statement I: Bacteria can be classified into two groups, Gram-positive and Gram-negative, on the basis of differences in their cell envelopes and the manner in which they respond to the staining procedure.
Statement II: The prokaryotic ribosomes are 15 nm by 20 nm in size and are made of two subunits, in which the smaller one has a sedimentation coefficient of 30 S and the larger one has a sedimentation coefficient of 40 S .

In the light of the above statements, choose the most appropriate answer from the options given below: