Final answer:
The phrase 'victim suffered a blow to the mental region' indicates that the victim was hit on the chin, not that they sustained a brain injury or skull fracture.
Step-by-step explanation:
When the question states that "the victim suffered a blow to the mental region," it is referring to the chin area of the face, not to the brain or mental faculties. Therefore, the correct answer is c) the victim was struck on the chin. The mental region is anatomically related to the lower jaw, and despite being part of the skull, a blow to this region does not necessarily imply a severe wound to the skull bones or a brain injury.