[A]: Chromosomes appear longer during te-lophase.
[R]: The term chromosome was coined by Waldeyer.

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

To solve the assertion and reasoning question, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
**Assertion (A)**: "Chromosomes appear longer during telophase."

- During telophase, the chromosomes actually begin to de-condense and become less compact. They are not longer; rather, they start to spread out and form chromatin. This is contrary to the assertion.
- Therefore, the assertion is **false**.

### Step 2: Analyze the Reasoning
**Reason (R)**: "The term chromosome was coined by Waldeyer."

- The term "chromosome" was indeed coined by Heinrich Waldeyer in the late 19th century. This statement is accurate.
- Therefore, the reasoning is **true**.

### Step 3: Determine the Relationship Between Assertion and Reasoning
- The assertion is false, while the reasoning is true.
- In this context, we need to assess the relationship between the two statements. Since the assertion is incorrect, it cannot be explained or supported by the reasoning.

### Conclusion
Based on the analysis:
- **Assertion (A)**: False
- **Reason (R)**: True

Thus, the correct answer to the assertion and reasoning question is that the assertion is false and the reasoning is true.

### Final Answer
- The correct option is **D**: Both A and R are false.

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