1(xii)
Assertion (A): Pericardial fluid is present between the heart and pericardium.
Reason (R): The human heart has four chambers.
- (a)(A) is true and (R) is false.
- (b)(A) is false and (R) is true.
- (c)Both (A) and (R) are true and (R) is the correct explanation of (A).
- (d)Both (A) and (R) are true, but (R) is not the correct explanation of (A).
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Both (A) and (R) are true, but (R) is not the correct explanation of (A).
Reason — Pericardial fluid is present between the heart wall and the pericardium, and the human heart does have four chambers. However, the number of chambers has nothing to do with the presence of this fluid. The pericardial fluid protects the heart from shocks and reduces friction during its beating.