yes u can achieve top 100 rank.......bur from today itself start ur prep and u must be focussed throughout the one year.........also buy some all india test series i dont know which r good but i have heard that bmat and fiitjee aits are good........about boards why should u worry for it now itself..........ur jee prep will be more than sufficient.........ya there r some thngs that have to be mugged up but u can do it during the last 3 months or so............