A: The Flagellum in protists is single stranded.
R: Single stranded flagellum has 9+2 structure.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

To solve the assertion and reason question, we will analyze both statements step by step.

### Step 1: Understand the Assertion
The assertion states that "The Flagellum in protists is single stranded."
- In this context, "single stranded" refers to the structure of the flagellum in protists, which typically has a simpler arrangement compared to other organisms.

### Step 2: Understand the Reason
The reason states that "Single stranded flagellum has a 9+2 structure."
- The 9+2 structure refers to the arrangement of microtubules in flagella and cilia, where there are 9 pairs of microtubules (doublets) surrounding 2 central microtubules. This structure is characteristic of eukaryotic flagella and cilia.

### Step 3: Analyze the Relationship between Assertion and Reason
- While both statements are true, the reason does not correctly explain the assertion. The assertion correctly identifies the flagellum in protists as single stranded, but the reason incorrectly implies that being single stranded means it has a 9+2 structure. In fact, the 9+2 structure is a feature of eukaryotic flagella in general, not specifically tied to the single stranded nature of protist flagella.

### Conclusion
- Therefore, both the assertion and the reason are correct, but the reason is not the correct explanation of the assertion.

### Final Answer
- The correct conclusion is that both statements are true, but the reason is not the correct explanation for the assertion.

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