Which of the following types of fractures involves the bone breaking into multiple pieces?

A closed fracture is a fracture where the skin remains intact over the fractured bone, and there is no open wound at the site of the fracture.

a. A fracture where the bone breaks through the skin: This type of fracture is known as an open or compound fracture, where the bone pierces through the skin.
b. A fracture where the bone is out of alignment: This type of fracture is known as a displaced fracture, where the bone fragments are not aligned properly.
c. A fracture where the bone is completely broken in two: A complete fracture refers to a fracture that results in two separate bone fragments, but it does not necessarily involve the skin.

Infection is a complication of fractures that can occur when bacteria enter the body through an open wound or during surgery. It presents with pain, warmth, redness, and swelling at the site.

b. Compartment syndrome: Compartment syndrome is characterized by severe pain, pallor, and loss of pulses distal to the fracture site, not warmth and redness.
c. Delayed union: Delayed union refers to a fracture that takes longer than usual to heal, and it does not typically present with warmth and redness.
d. Osteomyelitis: Osteomyelitis is a bone infection that can develop as a complication of fractures, but it does not typically present with warmth and redness at the site.