Which pH value lies outside the range found in the blood of a healthy person?

1. Blood pH averages about 7.4. 2. In a healthy person it can range from 7.35 to 7.45. 3. A value of 7.36 sits inside that range, just above the lower bound. 4. A value of 7.40 is the average itself. 5. A value of 7.44 sits inside the range, just below the upper bound. 6. A value of 7.30 falls below 7.35 and is therefore the only reading outside the healthy range. 7. Note that all four options are alkaline relative to pure water at pH 7.0, so being above 7.0 is not the discriminator. _Source: OpenStax Anatomy and Physiology (CC BY 4.0), Ch 18 "The Cardiovascular System: Blood", section 18.1 An Overview of Blood_