The lifespan of white blood cells ranges from? September 7, 2022September 8, 2022 mbilal005 CSS MPT MCQs, Everyday Science MCQs FPSC NTS PPSC Past Papers Test Questions (A) 13 to 20 days(B) 12 to 15 days(C) 14 to 18 days(D) None of these The answer is: (A) 13 to 20 days