Choose the correct statement

Options

A. Chlorophyll-a is solube in petroleum ether and shows maximum absorption peak at 453 nm and 642 nm.
B. In chlorophyll-b, `-CH_(3)` replaces`-CHO` at 3-C of chlorophyll -a
C. Chorophyll-b is soluble in methyl alochol and shows maximum absorption peak in 429 nm and 660 nm.
D. For the biosynthesis of chlorophyll, raw materials required are succinyl Co-A and glycine.

Answer

To solve the question "Choose the correct statement," we will analyze each of the provided statements regarding chlorophyll and its properties.

### Step-by-Step Solution:

1. **Analyze the First Statement**:
- The statement claims that "chlorophyll A is soluble in petroleum ether and shows maximum adsorption at 453 and 642 nanometers."
- **Evaluation**: Chlorophyll A is indeed soluble in petroleum ether, but it shows maximum absorption at approximately 465 nm and 665 nm, not 453 nm and 642 nm.
- **Conclusion**: This statement is **incorrect**.

2. **Analyze the Second Statement**:
- The statement claims that "in chlorophyll B, CH3 replaces CHO at the 3rd carbon of chlorophyll A."
- **Evaluation**: In chlorophyll B, it is actually the CHO (aldehyde group) that replaces CH3 (methyl group) at the 3rd carbon of chlorophyll A.
- **Conclusion**: This statement is **incorrect**.

3. **Analyze the Third Statement**:
- The statement claims that "chlorophyll B is soluble in methyl alcohol and shows maximum adsorption peak in 429 and 460 nanometers."
- **Evaluation**: Chlorophyll B is soluble in methyl alcohol, but it shows maximum absorption peaks at approximately 450 nm and 640 nm, not 429 nm and 460 nm.
- **Conclusion**: This statement is **incorrect**.

4. **Analyze the Fourth Statement**:
- The statement claims that "for the biosynthesis of chlorophyll, the raw material required is Succinyl Coenzyme A and Glycine."
- **Evaluation**: This statement is correct. Succinyl Coenzyme A and Glycine are indeed the precursors required for the biosynthesis of chlorophyll.
- **Conclusion**: This statement is **correct**.

### Final Answer:
The correct statement is: **"For the biosynthesis of chlorophyll, the raw material required is Succinyl Coenzyme A and Glycine."**

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