Answer: The correct answer is Option B.
Explanation:
Polymerization reaction is defined as a reaction in which monomer molecules react together to form a polymer chains which are three-dimensional networks.
Synthesis reaction is defined as a chemical reaction in which two or more chemical species react in their naturally occurring state to form a single large compound.
\(A+B\rightarrow AB\)
Replacement reaction is defined as a chemical reaction in which exchange of ions takes place. They are of two types: Single replacement and double replacement.
\(A+BC\rightarrow AC+B\\\\AB+CD\rightarrow AD+CB\)
Decomposition reaction is a type of chemical reaction in which a larger molecule breaks down into two or more smaller molecules.
\(AB\rightarrow A+B\)
The given reaction follows:
\(Mg(s)+S(s)\rightarrow MgS(s)\)
This is a type of synthesis reaction.
Hence, the correct answer is Option B.
