Assertion and Reason based on RBC flow

Assertion (A): Red blood cells are destroyed in the spleen after about 120 days.
Reason (R): The spleen is known as the graveyard of RBCs

A. Both A and R are true, and R is the correct explanation of A.
B. Both A and R are true, but R is not the correct explanation of A.
C. A is true, but R is false.
D. A is false, but R is true

EXPLANATION

Assertion (A):

“Red blood cells are destroyed in the spleen after about 120 days.”
✔️ True – Red blood cells (RBCs) have a lifespan of approximately 120 days.
After that, they become old and less flexible. These aged RBCs are trapped and destroyed in the spleen, where they are broken down.

---

Reason (R):

“The spleen is known as the graveyard of RBCs.”
✔️ True – The spleen removes aged and damaged RBCs from circulation.
Hence, it is commonly called the “graveyard of RBCs.”

---

✅ Since both A and R are true, and R directly explains A,

the correct answer is:

A. Both A and R are true, and R is the correct explanation of A