Which is of the following is the answer for reactions demonstrates a synthesis reaction?

The correct answer is C+O₂ →CO₂.
What is meant by synthesis reaction?
A synthesis reaction is a type of reaction in which multiple reactants combine to form a single product.
What are the characteristics of a synthesis reaction?
The hallmark of a synthesis reaction is that a more complex product is formed from the reactants. One easy-to-recognize type of synthesis reaction occurs when two or more elements combine to form a compound.
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