This question consists of two statements each: assertion (A) and reason (R). To answer this question, mark the correct alternative as directed below.
Assertion: Ribosomes occur in both plant and animal cells.
Reason: They play a role in respiration.

Options

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

Explanation

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

### Step 1: Analyze the Assertion (A)
**Assertion:** Ribosomes occur in both plant and animal cells.

- Ribosomes are indeed present in both plant and animal cells. They are essential cellular structures responsible for protein synthesis. This statement is **true**.

### Step 2: Analyze the Reason (R)
**Reason:** They play a role in respiration.

- Ribosomes are primarily involved in the synthesis of proteins, not directly in respiration. Respiration is mainly carried out in the mitochondria of the cell. Therefore, this statement is **false**.

### Step 3: Conclusion
Now we have:
- Assertion (A) is **true**.
- Reason (R) is **false**.

### Step 4: Determine the Correct Alternative
According to the options provided:
- If A is true and R is false, we would select the option that corresponds to this scenario.

### Final Answer
The correct answer is that the assertion is true and the reason is false.

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