Whereas the main or the core component of the mains examination is the UPSC mains answer writing, where candidates must be able to answer to all of the questions included in GS papers 1, 2, 3, and 4, and they must have a holistic and thorough understanding of every topic included in the UPSC mains syllabus. One who writes an answer now needs extensive and correct criticism because it will encourage them to write more questions on additional topics and get practical expertise in effectively writing about all the topics.