From the statements given below choose the correct option:

A. The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S.

B. Each ribosome has two sub-units. 

C. The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S

D. The two sub-units of 80S ribosome are 60S and 20S and that of 70S are 50S and 20S.

E> The two sub-units of 80S are 60S and 30S and that of 70S are 50S and 30S

To determine the correct option, let's analyze each statement individually:

Statement A: "The eukaryotic ribosomes are 80S and prokaryotic ribosomes are 70S."
This statement is biological fact. Eukaryotic cells contain 80S ribosomes in their cytoplasm, whereas prokaryotic cells contain 70S ribosomes. Thus, Statement A is true.

Statement B: "Each ribosome has two sub-units."
All ribosomes, whether prokaryotic or eukaryotic, consist of two subunits: a large subunit and a small subunit. Thus, Statement B is true.

Statement C: "The two sub-units of 80S ribosome are 60S and 40S while that of 70S are 50S and 30S"
Ribosomal subunits are measured in Svedberg units (S), which represent sedimentation rates. The subunits do not sum up mathematically because sedimentation depends on shape and density as well as mass:
- The eukaryotic 80S ribosome dissociates into a large 60S subunit and a small 40S subunit.
- The prokaryotic 70S ribosome dissociates into a large 50S subunit and a small 30S subunit.
Thus, Statement C is true.

Statement D & E: These statements provide incorrect combinations for the ribosomal subunits. Therefore, they are false.

Since statements A, B, and C are true, the correct option is "A, B, C are true".