To determine which of the provided options is an antibiotic, let's analyze each option:

1. **Sodium bicarbonate**: This is primarily used as an antacid and does not have antibacterial properties.

2. **Streptomycin**: This is an antibiotic that is used to treat various infections caused by bacteria.

3. **Alcohol**: While alcohol has antiseptic properties and can kill bacteria on surfaces, it is not classified as an antibiotic for internal use.

4. **Yeast**: This is a type of fungus used in baking and fermentation, and it does not possess antibiotic properties.

### Final Answer
The correct option is **B. Streptomycin**.

Question

To determine which of the provided options is an antibiotic, let's analyze each option:

1. **Sodium bicarbonate**: This is primarily used as an antacid and does not have antibacterial properties.

2. **Streptomycin**: This is an antibiotic that is used to treat various infections caused by bacteria.

3. **Alcohol**: While alcohol has antiseptic properties and can kill bacteria on surfaces, it is not classified as an antibiotic for internal use.

4. **Yeast**: This is a type of fungus used in baking and fermentation, and it does not possess antibiotic properties.

### Final Answer
The correct option is **B. Streptomycin**.

Knowee AI · Accepted Answer

To determine which of the provided options is an antibiotic, let's analyze each option:

1. **Sodium bicarbonate**: This is primarily used as an antacid and does not have antibacterial properties.

2. **Streptomycin**: This is an antibiotic that is used to treat various infections caused by bacteria.

3. **Alcohol**: While alcohol has antiseptic properties and can kill bacteria on surfaces, it is not classified as an antibiotic for internal use.

4. **Yeast**: This is a type of fungus used in baking and fermentation, and it does not possess antibiotic properties.

### Final Answer
The correct option is **B. Streptomycin**.

Which of the following is an antibioticsSelect an answerASodium bicarbonateBStreptomycinCAlcoholDYeast