Q. Consider the following statements:

1. The spleen is commonly referred to as the graveyard of RBCs (red blood cells).
2. The average lifespan of red blood cells (RBCs) in humans is 90 days.

Which of the above statement(s) is / are correct?
Answer: Only 1
Notes: The spleen is indeed often called the 'graveyard of RBCs' due to its role in removing old or damaged red blood cells from circulation. However, the typical lifespan of human RBCs is about 120 days, not 90 days. Thus, only the first statement is correct, making option 2 the correct answer.