The chlorophyll which is common between phaeophyceae and Diatoms, but absent in Rhodophyceae is

Options

A. Chlorophyll a
B. Chlorophyll c
C. Chlorophyll b
D. Chlorophyll e

Answer

To solve the question regarding the chlorophyll that is common between Phaeophyceae (brown algae) and diatoms but absent in Rhodophyceae (red algae), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Chlorophyll**:
- Chlorophyll is a pigment crucial for photosynthesis, allowing organisms to convert light energy into chemical energy. There are several types of chlorophyll, including A, B, C, D, and others.

2. **Identify the Chlorophyll in Phaeophyceae**:
- Phaeophyceae, commonly known as brown algae, primarily contains chlorophyll A and chlorophyll C.

3. **Identify the Chlorophyll in Diatoms**:
- Diatoms are a group of microalgae that also contain chlorophyll A and chlorophyll C.

4. **Identify the Chlorophyll in Rhodophyceae**:
- Rhodophyceae, or red algae, primarily contain chlorophyll A and do not have chlorophyll C.

5. **Compare the Chlorophyll Types**:
- From the information gathered, we see that both Phaeophyceae and diatoms share chlorophyll C. However, Rhodophyceae does not have chlorophyll C, only chlorophyll A.

6. **Conclude the Answer**:
- Therefore, the chlorophyll that is common between Phaeophyceae and diatoms but absent in Rhodophyceae is **Chlorophyll C**.

### Final Answer:
**B. Chlorophyll C**

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