In order to support life, which gases are not taken into the lungs?

Select from the following list:

a) Carbon dioxide
b) Nitrogen
c) Oxygen
d) both (a) & (b)
e) none of these

All gases are taken into the lungs.

A!!!!

letter E.. hehe..脺 i hope im right..脺

both a&b

All gasses listed are in the atmosphere and taken into
the lungs with every breath...

Hi there !
It looks like the tricky question from the MBBS/BTech entrance examination..wherein all are wrong ..at the same time..all are correct too..
the question itself is tricky..as the gas exchange takes place at the level of the lungs ., all gases do travel upto lungs level and the gas exchange take place in the blood at the alveolar level...
So the best answer among the options available may be "carbon di oxide"...??????

Hmm, well I'd say E,

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