Giving the question context:
In this question, we are given two mathematical expressions, g and h. We are asked to determine what g/h is isomorphic to. To do this, we need to understand the given expressions and their properties.

Understanding the given expressions:
Let's start by understanding the expressions g and h.

Expression g:
g = z4 × z2

Here, z4 represents the cyclic group of order 4, and z2 represents the cyclic group of order 2. The × symbol denotes the direct product of two groups.

The direct product of two groups is a way of combining them to create a new group. In this case, the direct product of z4 and z2 would result in a group with 4 × 2 = 8 elements.

Expression h:
Unfortunately, the expression for h is missing in the question. Please provide the expression for h so that we can proceed with the solution.

Conclusion:
To determine what g/h is isomorphic to, we need the expression for h. Once we have that, we can analyze the properties of g/h and find a group that is isomorphic to it.