$ Secondary growth occurs in those plants which have closed vascular bundles.
! Cork is produced by intrafascicular cambium.

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 the statements about secondary growth and cork production, we will analyze each statement step by step.

### Step 1: Analyze the Assertion Statement
The assertion states: "Secondary growth occurs in those plants which have closed vascular bundles."

- **Understanding Secondary Growth**: Secondary growth refers to the increase in the girth or width of a plant, which occurs due to the activity of lateral meristems (cambium).
- **Closed Vascular Bundles**: Closed vascular bundles are those that do not have cambium between xylem and phloem, typically found in monocots.
- **Conclusion**: Secondary growth is not limited to plants with closed vascular bundles; it occurs in plants with both open and closed vascular bundles. Therefore, this statement is **false**.

### Step 2: Analyze the Reasoning Statement
The reasoning states: "Cork is produced by intrafascicular cambium."

- **Understanding Cork Production**: Cork is a protective tissue produced during secondary growth, primarily by cork cambium (also known as phellogen).
- **Intrafascicular Cambium**: This is the cambium located between xylem and phloem in open vascular bundles. It does not produce cork.
- **Conclusion**: Since cork is produced by cork cambium and not intrafascicular cambium, this statement is also **false**.

### Step 3: Final Conclusion
Both the assertion and reasoning statements are false. Therefore, the correct answer is that both the assertion and reasoning are incorrect.

### Summary of the Solution
1. The assertion about secondary growth occurring only in plants with closed vascular bundles is false.
2. The reasoning about cork being produced by intrafascicular cambium is also false.
3. Thus, both statements are incorrect.