During the light-independent reaction, carbon dioxide is fixed by adding it to a

a.) 2-carbon compound
b.) 3-carbon compound
c.) 4-carbon compound
d.) 5-carbon compound

During the light-independent reaction, carbon dioxide is fixed by adding it to a 3-carbon compound

Option B

Explanation:

In the first stage of ''Calvin cycle'', light independent reactions are started and the carbon dioxide gets fixed from a molecule that does not have light to a molecule having light and in the second stage where carbon compound like ATP and NADPH gets reduced into a three carbon compound. This is done for converting energy in to a chemical bond energy for example in a glucose.