PPSC Assistant (BS-16) Labour And Human Resource – 2020, Everyday Science MCQs, PPSC Solved Past Papers MCQsWhen a person is killed by his brother is called as?A. Homicide B. Matricide C. Patricide D. Fratricide Summer Olympics 2022 is going to be held in ___?X and Y can do a piece of work in 20 days and 12 days respectively. X started the work alone and then after 4 days Y joined him till the completion of the work. How long did the work last?