In the given question, the sentence is divided into three parts I, II, and III. For each part, an alternate statement is also given. You have to determine if a part requires a correction and then mark that as your answer. What could Jackson Mendelson do/ in one day if he had won the/ Parliamentary election just a day before his demise? I. What Jackson Mendelson did II. in one day if he won the III. Parliament election just a day before his demise? Correct Answer Only II The correct answer is Only II. Key Points The error lies in the usage of had won instead of won. The given sentence is an example of the Second Type of conditional sentence that is used to state the result of an unlikely event occurring or an untruth being truth. Format 1 (To ask questions): Question word + would/could/should/might + V1(base form) + if + Past Simple tense + ? Format 2: If + Past Simple tense + would/could/should/might + V1(base form) Here, the sentence says a question is asked about the subject Jackson Mendelson about the result of an unlikely event of his victory in Parliamentary elections just before his demise. Hence, the correct sentence is: What could Jackson Mendelson do in one day if he won the Parliamentary election just a day before his demise? Important Points Let's look at two ways in which a question can be asked in the Second Type of conditional sentences: When the if-clause is before the main clause, use a comma. Example: If you were the world’s best at something, what would you like to be the world’s best at? We never use a comma when the if-clause is after the main clause. Example: What would you do if you were accused of murder?