Find out the correct options
1. Copper is present in cytochrome oxidase
2. Pantothenic acid is precursor of CoA
3. Thymine pyrophosphate is prosthetic group in decarboxylases
4. Zinc is present in RNA and DNA polymerases.

Options

A. 1 and 2
B. 2, 3 and 4
C. 1, 2, 3 and 4
D. 1, 3 and 4

Answer

To solve the question, we need to evaluate each of the four statements provided and determine which ones are correct.

### Step-by-Step Solution:

1. **Evaluate Statement 1: "Copper is present in cytochrome oxidase."**
- **Analysis:** Cytochrome oxidase is a crucial enzyme in the electron transport chain, and it contains copper as one of its components. Therefore, this statement is **correct**.

2. **Evaluate Statement 2: "Pantothenic acid is precursor of CoA."**
- **Analysis:** Pantothenic acid is indeed a precursor for coenzyme A (CoA), which is essential for various metabolic processes, including the Krebs cycle and fatty acid metabolism. Hence, this statement is also **correct**.

3. **Evaluate Statement 3: "Thymine pyrophosphate is prosthetic group in decarboxylases."**
- **Analysis:** Thiamine pyrophosphate (TPP) is a coenzyme involved in several enzymatic reactions, particularly in carbohydrate metabolism, but it is not a prosthetic group in decarboxylases. This statement is **incorrect**.

4. **Evaluate Statement 4: "Zinc is present in RNA and DNA polymerases."**
- **Analysis:** While zinc is an important trace element and is involved in various enzyme functions, it is not a component of RNA and DNA polymerases. This statement is also **incorrect**.

### Conclusion:
- The correct statements are **1 and 2**.
- Therefore, the answer to the question is that the correct options are **1 and 2**.