Question

where are the mammary glands located? over the pectoralis minor muscle under the pectoralis major muscle under the pectoralis minor muscle over the pectoralis major muscle

Explanation:

The mammary glands are located over the pectoralis major muscle. The pectoralis major is a large muscle in the chest area. The mammary glands are situated superficial (on top) to this muscle.

Answer:

over the pectoralis major muscle