Assertion : In lotus metabolism is hindered when the leaves are coated with wax on upper surface.
Reason : In lotus, stomata are present on upper epidermis, so that if leaves are coated with wax on upper surface, stomatal transpiration will not occur.

Options

A. If both Assertion and Reason are true and Reason is correct explanation of Assertions.
B. If both Assertion and Reason are true but Reason is not correct explanation of Assertion.
C. If Assertion is true but Reason is false.
D. If both Assertion and Reason are false.

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that in lotus, metabolism is hindered when the leaves are coated with wax on the upper surface. This implies that the wax coating affects the plant's ability to carry out metabolic processes.

2. **Understanding the Reason**: The reason provided explains that in lotus, stomata are present on the upper epidermis. It further states that if the leaves are coated with wax, stomatal transpiration will not occur. This suggests that the wax prevents water loss through transpiration, which is crucial for the plant's metabolic functions.

3. **Linking Assertion and Reason**: The assertion and reason are linked because if the wax coating prevents transpiration, it would lead to a lack of water and minerals entering the plant. This would subsequently hinder the plant's metabolism, as water and nutrients are essential for metabolic processes.

4. **Evaluating the Truth of the Statements**:
- The assertion is true because a wax coating can hinder metabolism by blocking transpiration.
- The reason is also true as lotus does have stomata on the upper surface, and a wax coating would indeed prevent transpiration.

5. **Determining the Correct Option**: Since both the assertion and reason are true, and the reason correctly explains the assertion, the correct option is: "Both assertion and reason are true, and reason is a correct explanation of assertion."