$ The tissue which connects a bone to the muscles is called cartilage.
! Haemoglobin of blood combines permanently with oxygen

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 solve the assertion-reason question, we will analyze both statements step by step.

### Step 1: Analyze the Assertion
- The assertion states: "The tissue which connects a bone to the muscles is called cartilage."
- We need to identify whether this statement is true or false.
- The correct term for the tissue that connects bones to muscles is **tendons**, not cartilage.
- Therefore, the assertion is **incorrect**.

### Step 2: Analyze the Reason
- The reason states: "Haemoglobin of blood combines permanently with oxygen."
- We need to evaluate the accuracy of this statement.
- Hemoglobin does bind with oxygen, but it does not do so permanently. It can release oxygen to the tissues when needed.
- Additionally, hemoglobin has a higher affinity for carbon monoxide (CO) than for oxygen, which can lead to dangerous situations.
- Thus, the reason is also **incorrect**.

### Step 3: Conclusion
- Both the assertion and the reason are incorrect.
- Therefore, the correct option is that both the assertion and reason are incorrect.

### Final Answer
- The assertion is incorrect because tendons connect bones to muscles, not cartilage.
- The reason is incorrect because hemoglobin does not permanently bind with oxygen.

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