Correct option is C
The correct answer is: (C) A single product is formed from two or more reactants.
A combination reaction is a chemical reaction in which two or more reactants combine to form a single product. These reactions are also known as synthesis reactions.
General Form of Combination Reaction:
A+B→ABA + B \rightarrow ABA+B→AB
Examples:
Reaction of Hydrogen and Oxygen:
Formation of Calcium Carbonate:
Two reactants (calcium oxide and carbon dioxide) combine to form a single product (calcium carbonate).
CaO+CO2→CaCO3CaO + CO_2 \rightarrow CaCO_3