I understand your doubt, but the correct answer is actually not c, "Threat to a patient's life." This is because "Threat to a patient's life" seems to be more related to a safety or life-critical issue rather than a typical product risk.
Product risks are generally associated with the development, quality, and functionality of a product or system. They can include issues that may affect the product's performance, quality, or delivery. Let's take a look at the other options to clarify:
a. "Not enough qualified testers to complete the planned tests" is an example of a product risk. This risk can impact the thoroughness of testing, which in turn may lead to undetected defects in the product.
b. "Software delivery is behind schedule" is also a product risk. Delays in software delivery can affect project timelines, potentially leading to rushed development and reduced product quality.
d. "3rd party supplier does not supply as stipulated" is a product risk as well. If a third-party supplier fails to deliver components or services as agreed, it can disrupt the product development process and impact product quality.
Product risks are those that affect the development, quality, or delivery of a product, while the threat to a patient's life is more related to safety and ethical considerations, which go beyond typical product risks in industries like software development or manufacturing.