National Assembly turned into a virtual combat ground when PML(N) leader Chaudhry Nisar Ali Khan used offensive words and members of Muttahida Qaumi Movement (MQM) vehemently reacted. The NAs session today was marked with rousing chaos when Muttahidas Sajid Ahmed and N-Leagues Abid Sher Ali exchanged hot words and were about to come to blows. Meantime, Leader of the Opposition in NA Chaudhry Nisar Ali Khan warned they not be taught democracy here, as there is a party with no elections within.