Question

Plants are removed from patients room at night, because

• A. They produce O${}_2$ at night in more concentration
• B. They do not photosynthesize at night, therefore fail to deplete CO${}_2$ of the room, instead their presence will increase CO${}_2$
• C. Both of the above
• D. None of the above

Answer 1

The correct option is B They do not photosynthesize at night, therefore fail to deplete CO${}_2$ of the room, instead their presence will increase CO${}_2$

During the night, photosynthesis gets shut down (since there's no light) and plants will give off CO${}_2$, produced due to respiration. So, plants are removed from patient's room at night because, they produce CO${}_2$ and also uses the oxygen present in the room, causing depletion of the oxygen content of the room.

So, the correct answer is option B.