katéri -a, -o which; who; that
kateri od vas je to storil? which of you has done this?
katerega smo danes? what day is it today?
katera je najboljša pot v...? which is the best way to...?
s katero roko pišeš? which hand do you write with?
katera je boljša od obeh? which is the better of the two?