Assertion:In coronary heart disease there is impairment of heart muscle
Reason:Reduced blood supply

Options

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
C. Assertion is true but Reason is false
D. Assertion is false but Reason is true

Answer

### Step-by-Step Solution

**Step 1: Understand the Assertion**
- The assertion states that "In coronary heart disease there is impairment of heart muscle."
- This is true because coronary heart disease (CHD) is characterized by damage to the heart muscle due to insufficient blood supply.

**Step 2: Understand the Reason**
- The reason states that "Reduced blood supply" is the cause of the impairment of the heart muscle.
- This is also true, as CHD typically results from narrowed or blocked coronary arteries, which leads to reduced blood flow to the heart muscle.

**Step 3: Analyze the Relationship Between Assertion and Reason**
- The reason provided explains why there is impairment of the heart muscle in coronary heart disease. Reduced blood supply leads to insufficient oxygen and nutrients for the heart muscle, causing it to become impaired.

**Step 4: Conclusion**
- Both the assertion and the reason are true, and the reason correctly explains the assertion.
- Therefore, the correct option is that both the assertion and reason are true, and the reason is the correct explanation for the assertion.

### Final Answer
- **Both Assertion and Reason are True, and Reason is the Correct Explanation of Assertion.**

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