In the vicinity of iron ore mining areas which one among the following elements would be high in ground water ?

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Q: 39 (SCRA/2013)
In the vicinity of iron ore mining areas which one among the following elements would be high in ground water ?

question_subject: 

Science

question_exam: 

SCRA

stats: 

0,18,14,4,3,7,18

keywords: 

{'iron ore mining areas': [0, 0, 0, 1], 'ground water': [3, 0, 0, 5], 'arsenic': [1, 0, 2, 3], 'elements': [0, 0, 2, 5], 'nitrate': [0, 0, 1, 4], 'calcium': [2, 0, 0, 4], 'fluoride': [1, 0, 0, 1], 'vicinity': [0, 1, 0, 1]}