Certain optional have better prospects at the preliminary?

The UPSC offers 23 optional in the preliminary. All optional offer equal chances of success. Usually the ”scaling System ” is followed. This method may be explained as follows: Total no. of candidates appearing at the examination with various optional = 1,00,00. Total no. of candidates to be selected for the Main Examination = 10,000. Candidates taking History = 20,000. Minimum representation to be secured of candidates who have opted for history = 2,000. Thus, every optional is weighted proportionally.