Question -
Statement I: Policemen regulating traffic at a crowded crossing often wear a mask. Statement II: Mask filters carbon dioxide and sends pure oxygen inside.
Options:
A .  Both statements are true
B .  Both statements are false
C .  Statement I is true and statement II is false
D .  Statement I is false and statement II is true.
Answer: Option C : C The air at a crowded crossing is generally very polluted. The mask over policemen's nose filters dust from the air but it is not meant to filter carbon dioxide.
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