The following apparatus was used to demonstrate the process of respiration in germinating seeds. The lime water in S turned milky, but the lime water in Q did not. Which statement correctly helps to explain this?

There was no carbon dioxide in the air entering at P, but there was in the air leaving S.

Photosynthesis at R absorbed all the carbon dioxide in the apparatus.

Respiration at R produced carbon dioxide which was absorbed by the soda lime.

Respiration at R produced carbon dioxide which was absorbed by the lime water.

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