The document provides information on the expected questions and marks distribution for the UPSC Civil Services Preliminary Examination in 2023. It lists the various themes/topics that may be covered in the exam, the number of questions expected from each theme, and the expected total marks. Some of the major themes include Polity, Economy, Environment, Science and Technology, History, and Geography. Under each theme, specific topics from the past years that can be tested in 2023 are identified.