The correct option is (c).
Explanation
Antibiotics are chemical substances produced by certain microbes (bacteria and fungi) that function to kill or inhibit the growth of other disease-causing microbes. They are distinct from synthetic analgesic or anti-inflammatory drugs.Statement-wise Analysis:
- Statement 1 is Correct: Streptomycin is an aminoglycoside antibiotic. It is produced by the soil bacterium Streptomyces griseus. It is historically significant as the first antibiotic effective against tuberculosis.
- Statement 2 is Incorrect: Aspirin (Acetylsalicylic acid) is not an antibiotic. It is a non-steroidal anti-inflammatory drug (NSAID) used to reduce pain, fever, and inflammation. It is a synthetic chemical compound, originally derived from salicylic acid found in willow bark, and is not a product of microbial metabolism.
- Statement 3 is Correct: Erythromycin is a macrolide antibiotic produced by the bacterium Saccharopolyspora erythraea (formerly classified as Streptomyces erythreus). It is widely used to treat various bacterial infections, particularly in patients allergic to penicillin.
Key Takeaway: Antibiotics such as Penicillin, Streptomycin, and Erythromycin are microbial products used to fight bacterial infections, whereas Aspirin is a synthetic drug used for pain relief and inflammation control.