Which of the following structures is an exocrine gland?
A.
Pineal gland
B.
Parathyroid gland
C.
Parotid gland
D.
Pituitary gland

The correct answer is:
C. Parotid gland
Explanation:
Parotid gland is an exocrine gland that secretes saliva into the oral cavity through ducts. Exocrine glands release their products onto epithelial surfaces via ducts, rather than directly into the bloodstream.
Pineal gland is an endocrine gland that secretes hormones such as melatonin directly into the bloodstream.
Parathyroid gland is an endocrine gland responsible for secreting parathyroid hormone (PTH) into the bloodstream.
Pituitary gland is an endocrine gland that secretes various hormones into the bloodstream to regulate other endocrine glands and bodily functions.
Therefore, the parotid gland is the exocrine gland among the options provided.