Question

Assertion (A): Reduced blood supply to heart muscles causes ischemia which results in chest pain.
Reason (R): It is a warning signal of deprivation of blood supply to heart muscles.

• A. Both (A) and (R) are true. (R) is correct explanation for (A)
• B. Both (A) and (R) are true. (R) is not correct explanation for (A)
• C. (A) is true. But (R) is false
• D. (A) is false. But (R) is true

Hint:

Ischemia means "restricted blood flow" which leads to hypoxia (lack of oxygen).
Remember, Angina Pectoris is acute chest pain that occurs when not enough oxygen reaches the heart muscle.

Answer 1

The Correct Option is A

Step 1: Read the assertion and reason separately.
Assertion says reduced blood flow to heart muscle (ischemia) causes chest pain. Reason says this pain works as a warning signal of poor blood supply.
Step 2: Check if the assertion is true on its own.
Yes, when coronary arteries narrow, the heart muscle receives less oxygen, switches to anaerobic metabolism, and builds up acidic byproducts that irritate nerve endings, producing angina pain.
Step 3: Check if the reason is true and connected.
The pain is exactly the body signalling that the heart is short on oxygen, so a person seeks rest or medical help before real damage occurs. This is precisely why the reason explains the assertion.
Final answer: Option 1, both statements true and R correctly explains A.