Which of the following is not a basic consumer right?
a) the right to safety
b)the right to be informed
c)the right to a refund
d)the right to a healthy environment

C) the right to refund 

Here is a list of basic consumer rights:
- The right to choose
- The right to safety
- The right to be informed
- The right to be heard
- The right to redress or remedy
- The right to a healthy environment
- The right to service
- The right to consumer education

As you can see, the right to a refund is not on this list, therefore making letter C the correct answer.