Consider the following statements
A. In prokaryotic cells a special membranous structure formed by the extension of the plasma membrane into the cell is known as polysome
B. The smooth endoplasmic reticulum is the major site for synthesis of glycoproteins
C. RuBisCo is the most abundant protein in the whole of biospshere
D. Mitochondria, chloroplasts and peroxisomes are not considered as part of endomembrane system
Of the above statements