This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: Thorax, Subject name: Anatomy
A patient sustains a knife wound through the right fouh intercostals space, 2 cm to the right of the sternum. The area most likely penetrated by the knife is the 
Select and explain. 
A. Right upper lobe of the lung, B. Right middle lobe of the lung, C. Right lower lobe of the lung, D. Right atrium of the hea
B: Right middle lobe of the lung
Answer: B: Right middle lobe of the lung 
Explanation: The right border of the hea is approximately 1 to 2 cm to the right of the right border of the sternum; therefore, the knife probably did not hit the hea. The middle lobe of the right lung extends from the level of the fouh costochondral junction to the level of the fifth intercostal space. The middle lobe is most likely at the level of the fouh intercostal space.