(A): The name helium is made after sun
(R): Helium is abundant gas in sun's chromosphere

Options

A. Both A & R are true, R is the correct explanation of A
B. Both A & R are true, R is not correct explanation of A
C. A is true, R is false
D. A is false, R is true

Answer

To analyze the assertion and reason provided in the question, we can break it down step by step.

### Step-by-Step Solution:

1. **Understanding the Assertion (A)**:
- The assertion states that "The name helium is made after sun."
- To evaluate this, we need to consider the origin of the word "helium." The term "helium" is derived from the Greek word "helios," which means "sun."

2. **Understanding the Reason (R)**:
- The reason states that "Helium is an abundant gas in the sun's chromosphere."
- The chromosphere is a layer of the sun's atmosphere, and it is indeed composed of various gases, with helium being one of the most abundant elements found there.

3. **Evaluating the Truth of A and R**:
- Since "helium" is derived from the Greek word for "sun," the assertion (A) is true.
- Additionally, since helium is found in significant amounts in the sun's chromosphere, the reason (R) is also true.

4. **Determining the Relationship Between A and R**:
- The assertion (A) and the reason (R) are both true, and the reason provides a correct explanation for the assertion. The name "helium" being derived from the sun is directly related to its abundance in the sun's chromosphere.

5. **Conclusion**:
- Both the assertion and the reason are true, and the reason is the correct explanation of the assertion.

### Final Answer:
Both A and R are true, and R is the correct explanation of A.