Which of the following statements is NOT true about streptomycin?

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It is used to treat tuberculosisIt is administered orallyIt is effective against gram-negative bacteriaNone of these

Explanation

Streptomycin is an antitubercular antibiotic effective against gram-negative bacteria. However, it is not given orally because it is poorly absorbed through the gastrointestinal tract and is typically administered via injection.