Chlorophyll 'a' and chlorophyll 'd' found in :-

Options

A. Rhodophyta
B. Phaeophyta
C. Chryosophyta
D. Myxophyta

Answer

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the specific types of chlorophyll, namely chlorophyll 'a' and chlorophyll 'd', and in which group of organisms they can be found.

2. **Analyzing the Options**:
- **Option 1: Rhodophyta**: This group is known as red algae. It is important to note that red algae contain chlorophyll 'a' and chlorophyll 'd' along with the accessory pigment phycoerythrin, which gives them their characteristic red color.
- **Option 2: Phaeophyta**: This group refers to brown algae. They primarily contain chlorophyll 'a' and chlorophyll 'c', but do not have chlorophyll 'd'.
- **Option 3: Chrysophyta**: This group includes golden algae. They contain chlorophyll 'a' and chlorophyll 'c', but again, not chlorophyll 'd'.
- **Option 4: Mixophyta**: This option is incorrect as it does not refer to a recognized group that contains chlorophyll 'a' and 'd'.

3. **Conclusion**: Based on the analysis, the correct answer is **Option 1: Rhodophyta**, as this is the only group that contains both chlorophyll 'a' and chlorophyll 'd'.

### Final Answer:
Chlorophyll 'a' and chlorophyll 'd' are found in **Rhodophyta** (red algae).

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