$ Cuscuta is dicot plant.
! In cuscuta the cotyledons are absent.

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 question regarding Cuscuta being a dicot plant and the absence of cotyledons, we can follow these steps:

### Step 1: Understand the Assertion
The assertion states that "Cuscuta is a dicot plant." We need to confirm whether this statement is true or false.

**Hint:** Recall the definition of dicot plants and their characteristics.

### Step 2: Verify the Assertion
Cuscuta, commonly known as dodder, belongs to the family Convolvulaceae and is indeed classified as a dicotyledonous (dicot) plant. Dicot plants typically have two cotyledons, but Cuscuta has some unique features.

**Hint:** Think about the characteristics that define dicots, such as leaf structure and stem anatomy.

### Step 3: Understand the Reason
The reason states that "in Cuscuta, the cotyledons are absent." We need to evaluate the truth of this statement as well.

**Hint:** Consider the typical structure of a seed and what cotyledons are.

### Step 4: Verify the Reason
In Cuscuta, the cotyledons are indeed absent in the mature plant. This is a unique feature of Cuscuta, as it is a parasitic plant that relies on host plants for nutrients. Although it is a dicot, the absence of cotyledons is a notable characteristic.

**Hint:** Reflect on how parasitic plants adapt to their environments and how this affects their morphology.

### Step 5: Determine the Relationship Between Assertion and Reason
Now that we have established that both the assertion and the reason are true, we need to analyze the relationship between them. The assertion states that Cuscuta is a dicot plant, while the reason explains that it lacks cotyledons.

**Hint:** Consider whether the absence of cotyledons explains why Cuscuta is classified as a dicot.

### Step 6: Conclusion
While both statements are true, the reason does not explain why Cuscuta is classified as a dicot. Therefore, the correct conclusion is that both the assertion and the reason are correct, but the reason is not the correct explanation of the assertion.

**Final Answer:** Both assertion and reason are correct, but the reason is not the correct explanation of the assertion.