Final answer:
The facial nerve is responsible for tear secretion through the lacrimal gland.
Step-by-step explanation:
The correct answer is (a) Facial.
The facial nerve, also known as cranial nerve VII, is responsible for tear secretion through the lacrimal gland. The lacrimal gland is the gland located lateral to the orbit that produces tears to wash across the surface of the eye.
For example, when you cry, the facial nerve stimulates the lacrimal gland to produce tears, which then flow through the lacrimal ducts and help wash your eyes.