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I think the correct answer from the choices listed above is option B. A Bronsted-Lowry acid is a proton donor. Let us consider a chemical reaction between HCl and NaOH. The hydroxide ions in the NaOH are bases because they accept hydrogen ions from acids to form water. An acid produces hydrogen ions in solution by giving a proton to the water molecule. So, the answer is HCN. 

The substance that would most likely act as a Bronsted-Lowry acid is HCN. Details about Brønsted-Lowry acid can be found below.

What is Bronsted-Lowry acid?

Bronsted-Lowry acid is is defined as a substance that gives up or donates hydrogen ions during a chemical reaction. On the other hand, a Bronsted-Lowry base accepts hydrogen ions.

This definition suggests that a Brønsted-Lowry acid must possess an hydrogen ion or proton to donate.

Therefore, the substance that would most likely act as a Bronsted-Lowry acid is HCN.

Learn more about Brønsted-Lowry acid at: https://brainly.com/question/14407412

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