Pharyngeal tonsils are

Options

A. Near surface of tongue
B. At the back of throat
C. Active throughout life
D. Adenoids.

Answer

### Step-by-Step Solution:

1. **Understanding Pharyngeal Tonsils**:
- Pharyngeal tonsils are a type of tonsil located in the throat. They are part of the immune system and help in fighting infections.

2. **Identifying the Other Names**:
- Pharyngeal tonsils are also known as adenoids. This is a crucial fact to remember as it directly relates to the question.

3. **Location of Pharyngeal Tonsils**:
- They are located at the back wall of the nasopharynx, which is the upper part of the throat that connects to the nasal cavity.

4. **Composition**:
- They are composed of lymphatic tissue, similar to other tonsils in the body.

5. **Functionality**:
- While they play a role in the immune system, they are not active throughout a person's life. Their size and function can change with age.

6. **Eliminating Incorrect Options**:
- The options provided include:
- Near the surface of the tongue at the back of the throat (incorrect).
- Active throughout life (incorrect).
- Adenoids (correct).
- Based on the information, the only correct option is "adenoids".

### Final Answer:
Pharyngeal tonsils are also known as adenoids.

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