Streptomycin B is also known as which?

• A. Sreptomycin
• B. Mannisidostreptomycin
• C. Hydroxystreptomycin
• D. Paromycin sulfate

Answer: (B)

Names of antibiotics often come with multiple synonyms from historical purification of mixtures. Streptomycin was decomposed into components labeled A, B, etc., and the B component has its own established name: mannisidostreptomycin. That makes it the correct match among the options. The other choices aren’t the recognized synonyms or refer to different compounds (a misspelling of streptomycin, a nonstandard term, or a different aminoglycoside).