Explanation
A finish to start dependency means that the successor activity cannot start until the predecessor activity has finished. In this case, the product testing is the predecessor activity and the product release is the successor activity. The product release cannot start until the product testing has finished, according to the quality management plan. Therefore, the project manager should enter this dependency as a finish to start dependency.
This is an example of a mandatory dependency, which is required by the nature of the work or by contract or law. References: PMBOK Guide, 6th edition, page 205; 4 Types of Dependencies In Project Management