PPSC Past Paper 2020 For the Post of Labour Officer, English MCQs, PPSC Solved Past Papers MCQs, Prepositions MCQsFill in the blank with appropriate preposition: He was indignant______ me for no reason?A. With B. At C. On D. Against The first UN Conference on Environment and Development was held in 1992 at?Chichen Itza is situated in?