430. The range of R.B.C to W.B.C in the human body is September 19, 2025 by Admin A. 15 : 500 B. 10 : 500 C. 5 : 500 D. 1 : 500 ✅ The correct answer is option D. The range of R.B.C to W.B.C in the human body is 1 : 500.