Answer:
The correct option is A. A synthesis reaction is a type of reaction that occur between two or more elements which produce a single product. It is also called combination reaction. For combination reaction, A + B = AB For decomposition reaction, a single product is broken down into two or more components. For single replacement reaction, a single free element will be substituted for one of the elements in a compound. For double replacement reaction, two compounds exchange elements between each other.
