The correct option is C Nucleoprotein (Nucleic acid + protein)
Bacteriophages are viruses that infect bacteria. Morphologically, phages have nucleic acid enclosed in proteinaceous capsid or coat i.e. they are made up of nucleoproteins. Phages can have ds DNA (lamda phage)/ ssDNA (MMV-L1)/ ssRNA (MS2) or ds RNA (phi-6) as their genetic material. Thus, the correct answer is option C.