A: ATP is a type of coenzyme.
R: Adenine is a type of pyrimidine.

Options

A. If both As and R are correct and R is correct explanation of As
B. If both As and R are correct but R is not correct explanation of As
C. If As is correct, R is wrong
D. If both As and R are wrong.

Answer

To analyze the assertion and reason statements provided in the question, we will evaluate each statement individually.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "ATP is a type of coenzyme."
- To evaluate this, we need to know what ATP (Adenosine Triphosphate) is. ATP is primarily known as an energy carrier in cells, not as a coenzyme. Coenzymes are organic molecules that assist enzymes in catalyzing reactions.

2. **Evaluating the Assertion**:
- ATP does not fit the definition of a coenzyme. Coenzymes are typically small organic molecules that bind to enzymes and assist in their activity. Examples include NAD and FAD. Therefore, the assertion that ATP is a type of coenzyme is **false**.

3. **Understanding the Reason**:
- The reason states that "Adenine is a type of pyrimidine."
- To evaluate this, we need to understand the classification of nitrogenous bases. There are two main categories: purines and pyrimidines. Adenine is classified as a purine, which has a double-ring structure, whereas pyrimidines have a single-ring structure (like cytosine, thymine, and uracil).

4. **Evaluating the Reason**:
- Since adenine is a purine and not a pyrimidine, the reason statement is also **false**.

5. **Conclusion**:
- Both the assertion and the reason are false. Thus, the correct answer to the question is that both statements are incorrect.

### Final Answer:
Both the assertion (A: ATP is a type of coenzyme) and the reason (R: Adenine is a type of pyrimidine) are false.

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