What is the Normal Life Span of a Red Blood

Question

What is the normal life span of a red blood cell?
A) 12 days
B) 12 weeks
C) 120 days
D) 12 months

Accepted Answer

The normal life span of a red blood cell is around 120 days, after which they are removed from circulation by the spleen and liver. Option A is too short, Option B is too long, and Option D is too long for a red blood cell's lifespan.