Submitted by examrobotsa on Thu, 01/01/1970 - 05:30 Which one among the following is the main ingredient in cement ?Gypsum Lime stoneClayAshquestion_subject: Historyquestion_exam: NDA-Istats: 0,20,11,8,20,1,2keywords: {'cement': [0, 0, 1, 4], 'main ingredient': [0, 0, 0, 1], 'lime stone': [0, 0, 0, 1], 'gypsum': [0, 0, 1, 3], 'clay': [2, 0, 1, 7], 'ash': [0, 0, 0, 1]}