A. oxidation
B. denitrification
C. reduction
D. phosphorylation
Correct Answer:
Option A – oxidation
Explanation
In biochemistry, chemosynthesis is the biological conversion of one or more carbon molecules (usually carbon dioxide or methane) and nutrients into organic matter using the oxidation of inorganic (e.g. hydrogen gas, hydrogen sulfide) or methane as a source of energy, rather than sunlight, as in photosynthesis.