An investigator is confronted with a life-threatening situation that necessitates using a test article in a human subject who is unable to provide informed consent and there is no time to obtain consent for the individual's legal representative. Under the FDA regulations, describes the best course of action for the investigator.

The  Institutional Review Board will be notified later.

Explanation:

The objective of informed consent provides sufficient information to a potential subject and enables that individual to make an informed choice about involvement in research. When both the investigator and an independent practitioner confirm the condition entails the application of the test article. In such circumstances, an exception can be made for informed consent under the  Food and Drug Administration regulations.

the correct answer is "hematoma formation, with ligaments that are stretched, partially, of fully torn" ankle sprain are produced by an injury to the tough bands of tissue (ligaments) that surround and connect the bones of the leg to the foot. this causes several damage to the ankle including hematoma formation and ligament injury .