<prompt> Culture of streptococcus viridans resembleStaphylococcusStreptococcus pyogenesPneumococcusStreptococcus faecalis  <response>: Streptococcus viridans and Streptococcus pneumoniae are alpha hemolytic. On blood agar, after incubation for 18 hours, the colonies are small 0.5-1mm, dome-shaped and glistening, with an area of green discolouration around them, resembling colonies of viridans streptococci. Reference: Textbook of Microbiology; Anathanarayan and panickers; 10th edition; Page no: 224 