Which of the following doesn't secrete saliva ?

Options

A. Parotid glands
B. Supra-maxillary glands
C. Sub-mandibular glands
D. Sub-lingual glands

Answer

To solve the question "Which of the following doesn't secrete saliva?" we will analyze the options provided:

1. **Parotid Glands**:
- These are major salivary glands located near the jaw. They are responsible for producing and secreting saliva, which aids in digestion and oral health.

2. **Submandibular Glands**:
- These glands are located beneath the jaw and also secrete saliva. They contribute to the majority of saliva production in the mouth.

3. **Sublingual Glands**:
- These glands are located under the tongue and are responsible for secreting saliva as well. They produce a smaller amount of saliva compared to the parotid and submandibular glands.

4. **Supramexillary Glands**:
- These glands are not commonly recognized as salivary glands. In fact, they are not found in humans. They are referred to in some contexts related to crustaceans (like crayfish) and are involved in excretory functions, not salivary secretion.

Based on this analysis, the correct answer to the question is **Supramexillary Glands**, as they do not secrete saliva.

### Step-by-Step Solution:
1. Identify the glands listed in the options.
2. Determine the function of each gland regarding saliva secretion.
3. Conclude which gland does not secrete saliva based on the information.