Which intruterine event is incorrectly matched with its time of occurrence ?

Options

A.
B.
C.
D.

Answer

To solve the question "Which intrauterine event is incorrectly matched with its time of occurrence?", we will analyze the development stages of a fetus during the gestation period.

### Step-by-Step Solution:

1. **Understand the Gestation Period**: The gestation period lasts approximately 9 months and is divided into three trimesters. Each trimester is about 3 months long.

2. **Identify Key Development Stages**:
- **First Month (1st Trimester)**: The heart is one of the first organs to develop, typically around the end of the first month (4 weeks).
- **Second Month (1st Trimester)**: Development of limbs and digits (fingers and toes) occurs during this time.
- **Third Month (1st Trimester)**: Basic structure and form of organs are established.
- **Second Trimester**: Development of hair (Lanugo) and opening of eyelids occurs.

3. **Evaluate the Options**:
- **Development of limbs and digits at the end of 2 months**: This is correct, as limbs and digits develop during the second month.
- **Development of heart at the end of 3 months**: This is incorrect. The heart develops at the end of the first month, not the third.
- **Development of hair and body in the second trimester**: This is correct, as hair develops during the second trimester.

4. **Conclusion**: The incorrectly matched event is the "development of heart at the end of 3 months", as it actually occurs at the end of the first month.

### Final Answer:
The incorrectly matched intrauterine event is the "development of heart at the end of 3 months".

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