Final answer:
Signs of a suspected extremity fracture include swelling and crepitus under the skin, rather than symptoms such as loss of consciousness or difficulty breathing which are related to other types of injuries. Therefore correct option is C
Step-by-step explanation:
The signs of a suspected extremity fracture include swelling and crepitus under the skin, which is a grating sound or sensation produced by the friction between bone and cartilage or the fractured parts of a bone. Loss of consciousness and pulsatile bleeding are more indicative of head injuries or major traumas, difficulty breathing may suggest a respiratory issue, and blood loss and tourniquet application could be associated with a variety of injuries, including fractures, but are not specific signs of a fracture.
Fractures can be very serious with potential complications such as fat embolisms from a fractured femur, which can lead to respiratory distress and even death if not treated quickly. Extreme caution should be exercised when a fracture is suspected, and professional medical assistance should be sought immediately.