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.