Final answer:
The lateral border of the scapula, also known as the axillary border, is the side that points towards the armpit and is the correct answer from the given options.
Step-by-step explanation:
The lateral border that points towards the armpit, or axilla, on the scapula is the axillary border, also known as the lateral border of the scapula. The acromion is a bony projection at the lateral end of the scapula's spine that forms the bony tip of the shoulder and does not directly point towards the armpit. The vertebral border runs parallel to the spine and the inferior angle is the lowest point of the scapula. However, among the options provided, the answer is the lateral border.