Question
| A. |
Superior thoracic artery |
| B. |
Thoracoacromial artery |
| C. |
Subscapular artery |
| D. |
Posterior circumflex artery |
|
Correct Answer � C Explanation |
 |
The artery marked as C in the image is incorrectly marked as a subscapular artery; it is the Brachial artery.
The brachial artery is the continuation of the axillary artery in the arm starting from the lower border of the teres major muscle whereas the subscapular artery is a branch arising from the third part of the axillary artery.
Reasons for ruling out other options are-
Option A. Superior thoracic artery: The structure marked A in the image is correctly denoting the superior thoracic artery. The superior thoracic artery is the only branch of the first part of the axillary artery.
Option B. Thoracoacromial artery: The structure marked B in the image is correctly denoting the thoracoacromial artery. The thoracoacromial artery is one of the two branches arising from the second part of the axillary artery
Option D. Posterior circumflex artery: The structure marked D in the image is correctly marked Posterior circumflex artery. The posterior circumflex artery is one of the three branches arising from the third part of the axillary artery.