Which is wrongly matched

Options

A. (a) Joseph Priestley - Showed that plants release `O_(2)`
B. (b) Jan Ingenhousz - Showed that sunlight is essential for photosynthesis
C. (c) Sachs - Plants produce glucose /starch
D. (d) Engelmann - Green substance is located within special bodies in plants

Answer

To solve the question "Which is wrongly matched?" regarding the contributions of various scientists to the understanding of photosynthesis, we will analyze each option provided.

### Step-by-Step Solution:

1. **Analyze Option A: Joseph Priestley showed that plants release oxygen.**
- Joseph Priestley conducted experiments with plants and discovered that they release oxygen. This is a well-documented finding in the study of photosynthesis.
- **Conclusion:** This match is correct.

2. **Analyze Option B: Jan Ingenhousz showed that sunlight is essential for photosynthesis.**
- Jan Ingenhousz performed experiments that demonstrated the necessity of sunlight for photosynthesis, confirming that plants require light to produce oxygen.
- **Conclusion:** This match is correct.

3. **Analyze Option C: Julius von Sachs showed that plants produce glucose or starch.**
- Julius von Sachs is known for his work on the storage of starch in plants and how plants convert carbon dioxide into glucose and starch during photosynthesis.
- **Conclusion:** This match is correct.

4. **Analyze Option D: Engelmann said that the green substance is located within special bodies in plants.**
- Engelmann did significant work related to photosynthesis, but he did not specifically identify chlorophyll or its location within chloroplasts. The discovery of chlorophyll is attributed to Joseph Caventou and Pierre-Joseph Pelletier in the 19th century.
- **Conclusion:** This match is incorrect.

### Final Answer:
The wrongly matched option is **D: Engelmann green substance is located within special bodies in plants.**

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