Which of the following is not one of the three basic economic questions?
a. what to produce
b. how to produce it
c. where to produce it
d. who will consume what is produced

The right answer is C. where to produce.

The three economic questions is an economic theory that raises how societies should respond to basic economic questions about the goods and services they produce. The three questions that must be answered are:
- What should we produce?: This includes the goods and services that must be produced and the quantities in which they should be produced.
- How should we produce it?: This refers to the type of technology that will be used to produce the products.
- For whom should we produce it?: Who will receive the goods and services that will be produced.

I hope this information can help you.