$ Chlorosis means destruction or the loss of chlorophyll pigments.
Chlorosis cause geotropism

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 chlorosis and its relationship with geotropism, we can break it down into the following steps:

### Step 1: Understand the Definition of Chlorosis
Chlorosis is defined as the destruction or loss of chlorophyll pigments in plants. This condition leads to yellowing of leaves, which is a visible symptom of chlorophyll deficiency.

### Step 2: Identify Causes of Chlorosis
Chlorosis can occur due to various reasons, primarily nutrient deficiencies. This may be due to:
- Lack of essential nutrients in the soil (e.g., nitrogen, iron).
- Inability of the plant to absorb these nutrients due to poor soil conditions or root damage.

### Step 3: Analyze the Assertion
The assertion states that "Chlorosis means destruction or the loss of chlorophyll pigments." Based on our understanding from Step 1 and Step 2, this assertion is correct.

### Step 4: Understand Geotropism
Geotropism refers to the growth of plant parts in response to gravity. Roots typically exhibit positive geotropism (growing downward), while shoots exhibit negative geotropism (growing upward).

### Step 5: Analyze the Reason
The reason states that "Chlorosis causes geotropism." However, this is incorrect. Chlorosis does not influence or cause geotropism; rather, geotropism is a response to gravitational forces, independent of chlorophyll levels.

### Step 6: Conclusion
Based on the analysis:
- The assertion is true (chlorosis is indeed the loss of chlorophyll).
- The reason is false (chlorosis does not cause geotropism).

Thus, the correct answer to the question is that the assertion is correct, but the reason is incorrect.

### Final Answer
The correct option is: Assertion is true, Reason is false.

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