Read the following statements and select the correct one:
S-type strains of Streptococcus pneumonia is virulent due to the absence of mucus.
R-type strains of Streptococcus pneumonia is virulent due to the absence of mucus.
S-type strains of Streptococcus pneumonia is virulent due to the presence of mucous.
R-type strains of Streptococcus pneumonia is virulent due to the presence of mucous.
As we have already studied in The Search For Genetic Material: Transforming Principle -
S-type strain of Streptococcus pneumonia is virulent due to the presence of mucus over the cells.
Hence, the correct option is (c).