Statement (S). : Cockroach is "paurometabolus" with reference to its development
Reason ( R). : In the development of cockroach, there is no nymphal stage

Options

A. Both S and R are correct but R is not correct explanation to S
B. Both S and R are correct and R is the correct explanation to S
C. S is wrong but R is correct
D. S is correct but R is wrong

Answer

To analyze the given statement and reason regarding the cockroach's development, we can break down the explanation step by step.

### Step-by-Step Solution:

1. **Understanding the Term "Paurometabolus":**
- The term "paurometabolus" refers to a type of development in insects where there is a gradual change from immature forms to adults. This means that the young insects (nymphs) resemble the adults and live in the same habitat.

2. **Identifying the Life Cycle of Cockroaches:**
- Cockroaches undergo a life cycle that includes several stages: egg, nymph, and adult. The nymph stage is crucial as it represents the immature form of the cockroach.

3. **Evaluating the Statement (S):**
- The statement claims that "Cockroach is 'paurometabolus' with reference to its development." This is true because cockroaches do exhibit gradual metamorphosis, where nymphs resemble adults and share the same habitat and food.

4. **Evaluating the Reason (R):**
- The reason states, "In the development of cockroach, there is no nymphal stage." This is incorrect because cockroaches do have a nymphal stage, which is the second stage of their life cycle.

5. **Conclusion:**
- Since the statement (S) is true and the reason (R) is false, we conclude that the correct answer is that only the statement is correct while the reason is incorrect.

### Final Answer:
The correct answer is that the statement (S) is true, but the reason (R) is false.

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