A 21 -Year-Old Man Was Walking Along a City Street

A 21 -year-old man was walking along a city street when suddenly a burst of automatic gunfire came from a passing car. The man, who was an innocent bystander, was struck in the front of the chest by a stray bullet. He was rushed to the emergency department by an ambulance. The position of the entry wound was the fourth left intercostal space about 3 in. from the midline.
-The following observations are in agreement with the findings in this patient except which?

A) The right ventricle is the most likely chamber of the heart to be injured should a bullet enter the frontal surface of the chest.
B) If the bullet continues on its path, the left ventricle is also damaged, since the left ventricle lies posterior to the right ventricle.
C) The circumflex branch of the left coronary artery may be damaged by the bullet as it runs down the anterior surface of the heart.
D) The chordae tendineae of the anterior cusp of the tricuspid valve could be injured.