Which of the following are correctly matched? a) compound fracture; the fractured bone ends penetrate the skinb) non-displaced fracture; the fractured bone ends are misalignedc) incomplete fracture; the bone is broken throughd) linear fracture; the break is perpendicular to the bone's long axis

The correct match is compound fracture: the fractured bone ends penetrate the skin. Letter A

Explanation:

A compound fracture, also known as open fracture, is a fracture in which there is an open wound or break in the skin near the site of the broken bone. Most often, this wound is caused by a fragment of bone breaking through the skin at the moment of the injury.

the backbone of the dna and rna compound is sugar phosphate.