Which one of the following is the correct order of pH for the given substances?

The pH scale measures the acidity or alkalinity of a substance, ranging from 0 (highly acidic) to 14 (highly alkaline), with 7 being neutral. Lemon juice is highly acidic with a pH typically between 2.0 and 3.0. Black coffee is mildly acidic, generally falling in the range of 4.85 to 5.4. Human blood is slightly alkaline (basic), maintaining a very narrow and stable pH range of approximately 7.35 to 7.45. Milk of magnesia, commonly used as an antacid to neutralize stomach acid, is strongly alkaline with a pH of approximately 10.0 to 10.5. Therefore, the correct ascending order of pH (from most acidic to most basic) is Lemon juice < Coffee < Blood < Milk of magnesia.