In the reaction X+Y (R) Z, Z is the

A)Substrate
B)Product
C)Enzyme
D)Carbon Molecule

To determine the answer to this question, you need to have a basic understanding of chemical reactions and the terms used to describe them. Let's break it down:

In a chemical reaction, reactants are the substances that undergo a change to form new substances called products. The reactants are written on the left side of the chemical equation, while the products are written on the right side.

In the given reaction X+Y (R) Z, X and Y are the reactants, and Z is the product. The reactants, X and Y, come together to form the product, Z.

Therefore, the correct answer is B) Product.