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Which of the following would be included in the calculation of Gross Domestic Product (GDP) ?
pH
A measure of the hydrogen ion concentration in a solution, indicating its acidity or alkalinity on a scale where 7 is neutral, lower values are acidic, and higher values are basic.
K
Potassium, an essential dietary mineral and elemental metal with the atomic symbol 'K', crucial for nerve function and muscle contraction.
pH
A scale that measures how acidic or basic water-based solutions are, stretching from 0 to 14.
pH
A scale used to specify the acidity or basicity of an aqueous solution, ranging from 0 (most acidic) to 14 (most basic).
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