Answer: Sublingual gland
Explanation:
Sub means below or under and lingual means related to tongue.
This gland produces mucous secretions.!
The duct of this gland through which it drains is called Bartholin's duct .
REST OF THE OPTIONS :-
- Mixed glands: glands that produce both the serous and mucous secretions
- Parotid gland: it is the largest gland of all 3 major salivary glands and it is present in front of the both ears
- Stensen's duct: it is the duct of parotid gland that opens opposite to second molar.