Microbiology Classification of pathogenic streptococci into group A, B, C, D and G is based on A Color of colonies on blood agar B Antigenicity of cell wall carbohydrate C Presence or absence of capsule D Presence or absence of M protein 💡 Explanation Classification of pathogenic streptococci into group A, B, C, D and G is based on ✓ Correct Answer: B. Antigenicity of cell wall carbohydrate