question_subject:
Science
question_exam:
NDA-II
stats:
0,15,35,19,6,10,15
keywords:
{'neutral water': [0, 0, 1, 0], 'aeration': [0, 0, 2, 0], 'ph': [3, 0, 3, 3], 'water molecules': [0, 0, 1, 0], 'water': [65, 15, 80, 129], 'ultraviolet radiation': [1, 0, 1, 0], 'oxygen': [3, 0, 1, 0]}