The correct answer is: D. Mr. Gupta advised his son not to take up any responsibility unless he was confident that he could do it.
Mr. Gupta is advising his son to be careful about the responsibilities he takes on. He wants his son to make sure that he is confident in his ability to complete a task before he takes it on. This is good advice, as it can help to prevent the son from feeling overwhelmed or stressed. It can also help to ensure that the son completes the task to the best of his ability.
Option A is incorrect because it does not include the word “confident.” The word “confident” is important because it emphasizes that Mr. Gupta wants his son to be sure of his ability to complete a task before he takes it on.
Option B is incorrect because it does not include the word “responsibility.” The word “responsibility” is important because it specifies that Mr. Gupta is advising his son about taking on responsibilities.
Option C is incorrect because it does not include the word “unless.” The word “unless” is important because it specifies that Mr. Gupta is advising his son not to take on a responsibility unless he is confident that he can do it.