Onset of menstrual cycle in female anthrapoid primates is

Options

A. Puberty
B. Menarche
C. Menopause
D. Menstruation

Explanation

To answer the question regarding the onset of the menstrual cycle in female anthropoid primates, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Question**: The question asks about the onset of the menstrual cycle in female anthropoid primates. We need to identify the correct term that describes this onset.

2. **Analyzing the Options**:
- **Puberty**: This is the developmental stage when an individual becomes sexually mature. In girls, this typically occurs between the ages of 10 to 14 years. However, it does not specifically refer to the onset of menstruation.
- **Menarche**: This term specifically refers to the first occurrence of menstruation. It marks the beginning of the menstrual cycle in females and generally occurs around the same age as puberty.
- **Menopause**: This is the stage in a woman's life when menstrual cycles cease, typically occurring between the ages of 45 to 50 years. It signifies the end of reproductive capability, not the onset.
- **Menstruation**: This refers to the monthly cycle itself, which includes various phases, but it does not denote the initial onset.

3. **Identifying the Correct Answer**: Among the options, "Menarche" is the term that specifically indicates the onset of menstruation. Therefore, it is the correct answer to the question.

4. **Conclusion**: The onset of the menstrual cycle in female anthropoid primates is referred to as "Menarche."

### Final Answer:
The correct answer is **Menarche**.

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