• Statement (I) is True: Ribosomal translation in all living organisms incorporates exclusively L-stereoisomers of $\alpha$-amino acids into polypeptide chains.
• Statement (II) is False: The "L" descriptor designates absolute configuration relative to L-glyceraldehyde, not the direction of optical rotation. While all protein amino acids are L-configured, some rotate plane-polarized light to the right (dextrorotatory, $+$, e.g., L-alanine, L-isoleucine, L-glutamate) and others to the left (levorotatory, $-$) in neutral aqueous solutions.
• Conclusion: Statement (I) is true but Statement (II) is false.

Correct option: (3) Statement (I) is true but Statement (II) is false.

• Phosphoprotein $\rightarrow$ (III) Casein: Bovine milk casein is heavily phosphorylated on serine and threonine residues, binding calcium ions as colloidal micellar complexes.
• Glycoprotein $\rightarrow$ (IV) Immunoglobulin G: IgG contains conserved $N$-linked oligosaccharide glycan chains covalently attached to the Fc domain at Asn-297.
• Flavoprotein $\rightarrow$ (I) Succinate dehydrogenase: Mitochondrial Complex II enzyme containing covalently bound Flavin Adenine Dinucleotide (FAD) prosthetic group.
• Metalloprotein $\rightarrow$ (II) Alcohol dehydrogenase: Contains tightly coordinated catalytic and structural zinc ions ($\text{Zn}^{2+}$) essential for hydride transfer.

Correct option: (1) (A) - (ill), (B) - (IV), (C)- 0, (B) - (I)