Ashok traded with kajal, who work on monday. so here who works on moday to whome kajal or ashok? i always get confuse in this type of statement how to understand it?

WHO = Kajal. if there was AND in place of WHO, in that case: AND = Ashok Simple trick is, we use AND to refer to the 1st person, while, we use WHO to refer to the 2nd person. Hope I cleared your doubt. :)