ANSWER
Option
Step-by-step explanation
pH measures the acidity and alkalinity of a substance
The pH of the acid decreases from 1 to 7 on the pH scale while the pH of the base increases from 7 to 14 to increases
Recall, that a strong acid has pH value ranging from 1 to 3
Strong acid is defined as the type of acid which will produce hydrogen ions as the only positive ions when completely dissolved in water. This implies that strong acid has the largest number of hydrogen ions (H+). Therefore, a substance with pH value 1 will have the largest number of hydrogen ions
Hence, the correct answer is option A