Chemistry of photosynthetic pigments was first studied by

Options

A. Willstatter and Stoll
B. Pellebtier and Caventou
C. Priestley
D. Engelmann.

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about who first studied the chemistry of photosynthetic pigments.

2. **Review the Options**: The options provided are:
- A) Wilstater and Stoll
- B) Palletier and Cavendish
- C) Presley
- D) Engelmann

3. **Recall Historical Contributions**:
- Wilstater and Stoll are known for their work on chlorophyll and its structure.
- Palletier and Cavendish are known for their contributions to chemistry but not specifically for photosynthetic pigments.
- Joseph Priestley is known for his discovery related to gases and photosynthesis but not specifically for pigments.
- Engelmann is known for his experiments on the effect of light colors on photosynthesis.

4. **Determine the Correct Answer**: Based on historical context, Wilstater and Stoll conducted significant research on the chemistry of chlorophyll in 1912, which included discovering its structure and components.

5. **Conclude**: Therefore, the correct answer to the question is **A) Wilstater and Stoll**.

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