Mucus, saliva, earwax, oil, milk, and tears are secreted by
The correct option is A Exocrine glands
Exocrine glands release chemical substances through ducts to outside the body or onto another surface within the body.
Examples of exocrine glands include
salivary - salivary
mammary - milk
ceruminous - ear wax
lacrimal - tears
sebaceous - oil
mucous - mucus.