The first menstruation beings at `ul((A))` and is called `ul((B))`.

Answer

To answer the question, we need to identify two key pieces of information regarding menstruation:

1. The age range when the first menstruation begins.
2. The term used to describe the first menstruation.

### Step-by-Step Solution:

**Step 1: Identify the age range for the first menstruation.**
- The first menstruation, also known as menarche, typically occurs during puberty. According to the information provided, this usually happens between the ages of 11 to 14 years.

**Step 2: Identify the term for the first menstruation.**
- The term used to describe the first menstruation is "menarche."

### Final Answer:
- The first menstruation begins at **(A) 11 to 14 years** and is called **(B) menarche**.

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