tell me how i can crack upsc in first time sir i want to be an i.a.s officers and i have two subjects,history and public administration but sir my father says first of all u prepared at home then u can go to delhi for civil services coaching .sir im preparing for history at home recently .tell me mi diong right or not wht should i do and how can i get the previous papers of i.a.s last fifteen years .someone has told me if i read last fifteen years papers u can crack upsc as well as that u will go on ur study.plz sir encourage me.