Question

Given below are two statements: One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Troponins become detectable in 2 to 4 hours in circulation in cases of MI.
Reason (R) : In myocardial infarction, cellular enzymes leak into the blood.
In the light of the above statements, choose the most appropriate answer from the options given below:

• A. Both (A) and (R) are correct and (R) is the correct explanation of (A)
• B. Both (A) and (R) are correct but (R) is NOT the correct explanation of (A)
• C. (A) is correct but (R) is not correct
• D. (A) is not correct but (R) is correct

Hint:

Troponins rise early because cardiac cells rupture — enzyme leakage explains their appearance.

Answer 1

The Correct Option is A

Assertion (A) is true because cardiac troponins (T and I) are sensitive and specific markers for myocardial infarction.
They start to rise within 2 to 4 hours after cardiac muscle injury.
Reason (R) is also true because during an MI, damage to myocardial cells causes leakage of cellular contents, including enzymes and proteins like troponins, into the bloodstream.
Thus, the reason correctly explains why troponins become detectable after MI.
Therefore, both statements are true and (R) correctly explains (A).