Which one of the following air pollutants can affect blood stream leading to death ?

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Q: 75 (UPPSC/2013)

Which one of the following air pollutants can affect blood stream leading to death ?

question_subject: 

Science

question_exam: 

UPPSC

stats: 

0,37,36,10,7,19,37

keywords: 

{'air pollutants': [0, 0, 0, 2], 'asbestos dust': [0, 0, 0, 1], 'carbon monoxide': [3, 0, 1, 1], 'cadmium': [1, 0, 0, 0], 'blood stream': [1, 0, 1, 1], 'lead': [7, 1, 11, 11], 'death': [5, 3, 6, 7]}