Q. which of the following is a poisonous gas ?
a) Carbon dioxide
b) Carbon monoxide
c) Nitrogen
d) All of these
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hey|!!!.
here is u r answer.
all of these
here is u r answer.
all of these
Anonymous:
okay ur wish
why are u so confident
thats overconfidence actually
never mind
dont chat here please....bye tc
okk bye
bye sis
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