AIIMS 2018 Chemistry pH Scale MCQ Question

The statement is false because while blood has a pH of 7.4, it does not have the maximum pH compared to other substances. For instance, pure water (pH 7) can be considered neutral and is often compared to blood; however, substances with a pH above 7, such as certain alkaline solutions, can exceed blood's pH. Additionally, the pH scale ranges from 0 to 14, where values below 7 are acidic and above 7 are basic; thus, blood is not the highest pH when considering all possible solutions. Options (A) and (C) are incorrect as they either affirm the statement or suggest uncertainty, which is not applicable here.