Select the correct option with respect to cockroaches:

Options

A. Malpighian tubules convert nitrogenous wastes into urea
B. Males bear short anal styles not present in females
C. Nervous system comprises of a dorsal nerve cord and ten pairs of ganglia
D. the forewings are tegmina which are used in flight

Answer

To solve the question regarding the correct statement about cockroaches, we will analyze each provided statement step by step.

### Step 1: Analyze the first statement
**Statement**: Malthusian tubules convert nitrogenous waste into urea.

**Analysis**: Malthusian tubules, also known as Malpighian tubules, are excretory structures in cockroaches. They do not convert nitrogenous waste into urea; instead, they help in the excretion of waste products. Therefore, this statement is **false**.

### Step 2: Analyze the second statement
**Statement**: Males have small anal styles not present in females.

**Analysis**: This statement is correct. Male cockroaches possess small structures called anal styles, which are absent in females. These structures are involved in reproduction and help attract females. Therefore, this statement is **true**.

### Step 3: Analyze the third statement
**Statement**: The nervous system comprises a dorsal nerve cord and 10 pairs of ganglia.

**Analysis**: The nervous system of cockroaches consists of a dorsal nerve cord and **12 pairs** of ganglia, not 10. Thus, this statement is **false**.

### Step 4: Analyze the fourth statement
**Statement**: The forewings are tegmina which are used in flight.

**Analysis**: The forewings of cockroaches are indeed called tegmina, but they are not primarily used for flight. The hindwings are the ones that facilitate flight. Therefore, this statement is also **false**.

### Conclusion
After analyzing all the statements, the only correct statement is the second one: "Males have small anal styles not present in females."

### Final Answer
The correct option is the **second option**.

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