Choose the correct statement regarding the microbes-

Options

A. Aspergillus niger is bacterium which is used for obtaining acetic acid & citric acid
B. Streptokinase is used as a clot buster
C. Monascus purpureus is reponsible for production of large holes in Swiss cheese
D. Toddy is manufactured by Lactobacillus

Answer

To solve the question regarding the correct statement about microbes, we will analyze each statement provided in the question.

### Step-by-Step Solution:

1. **Identify the Statements**:
We need to evaluate the statements regarding microbes mentioned in the question. The statements relate to different microbes and their uses or characteristics.

2. **Evaluate Statement 1**:
- The first statement mentions *Aspergillus niger* as a source of acetic acid and citric acid.
- This statement is incorrect because *Aspergillus niger* is primarily known for producing citric acid, while acetic acid is produced by *Acetobacter aceti*.

3. **Evaluate Statement 2**:
- The second statement claims that Streptokinase, a clot buster, is produced by the bacteria *Streptococcus*.
- This statement is correct. Streptokinase is indeed produced by *Streptococcus* and is used in medical treatments for heart attacks.

4. **Evaluate Statement 3**:
- The third statement states that *Monascus purpureus* is responsible for the production of large holes in Swiss cheese.
- This statement is incorrect. The holes in Swiss cheese are produced by *Propionibacterium shermanii*, while *Monascus purpureus* is known for producing statins, which are cholesterol-lowering agents.

5. **Evaluate Statement 4**:
- The fourth statement claims that Toddy is manufactured by *Lactobacillus*.
- This statement is also incorrect. Toddy is a traditional drink made from the sap of palm trees and does not involve *Lactobacillus* in its production process.

6. **Conclusion**:
- After evaluating all the statements, the only correct statement is the second one regarding Streptokinase being produced by *Streptococcus*. Thus, the correct answer is option number 2.

### Final Answer:
The correct statement regarding the microbes is: **Streptokinase, a clot buster, is produced by the bacteria *Streptococcus*.**

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