In this section, we introduce the responses of ChatGPT and BingChat from the previous samples. First, for the knowledge level question, ChatGPT gives a correct answer while BingChat provides assistance but does not fully answer the question. Although it does not provide a solution, BingChat provides direction for problem-solving. ChatGPT: The molecular formula of Este X is C4H8O2. When X is hydrolyzed in excess NaOH solution, the product obtained is a mixture of sodium propionate and alcohol Y. The formula of Y is: The general formula of an ester is RCOOR', where R and R' are carbon and hydrogen groups. When an ester is hydrolyzed with excess NaOH solution, it is broken down into a salt of carboxylic acid and alcohol. In this case, Este X will be broken down into sodium propionate and an alcohol with a general formula of R'OH. The formula of sodium propionate is C3H5COONa, so the remaining part of Este X has a formula of CH3CH2CO-. Therefore, R' is a butyl group and alcohol Y has a formula of C4H9OH. Therefore, the answer is: C. C3H7OH.