Which of the following is not one of the three core economic issues that must be resolved?

(a). How to produce the goods and services we select.

(b). What to produce with unlimited resources.

(c). Who should get the goods and services we produce.

(d). What to produce with limited resources.

(b). What to produce with unlimited resources.

Explanation:

The main economies issues involve how to produced, what to produced and whom to produced

How to produced involves the method by which the production could take place i. e machinery, equipment, etc. It consists of a labor-intensive technique and capital intensive technique.

What to produce: It is a most important question about what type of product is to be produced, in which quantities, etc

Whom to produce: For which classes, the product should be produced. It would be lower, middle or upper class. This can be determined by analysis of purchasing power

And we already know the resources are very limited.