Microbiology General 173e8e1e Dental caries is caused by - A Streptococcus pyogenes B Streptococcus mutans C Enterococcus D H. influenzae High-Yield Explanation Ans. is 'b' i.e., Streptococcus mutans . Streptococcus mutans belongs to viridans streptococci and is an impoant cause of dental caries.