## Core Concept
The sublingual salivary gland is one of the major salivary glands, responsible for producing saliva that aids in digestion and oral health. It is located under the tongue and has a unique drainage system. The sublingual gland's secretions help in maintaining oral hygiene and facilitating the initial digestive process.

## Why the Correct Answer is Right
The sublingual salivary gland is drained by multiple small excretory ducts, known as the **Rivinus' ducts** or **minor sublingual ducts**, which open directly into the oral cavity. In addition to these, the gland also has a major duct, known as **Bartholin's duct**, which merges with the submandibular duct (Wharton's duct) to drain into the oral cavity. However, the question specifically mentions "8-20 excretory ducts," which refers to the numerous small ducts (Rivinus' ducts) characteristic of the sublingual gland.

## Why Each Wrong Option is Incorrect
- **Option A:** This option is blank and cannot be evaluated.
- **Option B:** This option is also blank and does not provide any information for evaluation.
- **Option C:** Similarly, this option does not contain any text for assessment.
- **Option D:** This option is blank as well.

## Clinical Pearl / High-Yield Fact
A key point to remember is that the sublingual gland contributes to the production of **mucins**, which are crucial for the lubrication of food and the protection of the oral mucosa. The unique drainage system of the sublingual gland, with its multiple small ducts, facilitates the secretion of saliva into the oral cavity.

## Correct Answer: B. Rivinus' ducts.