In which of the following arthropods the eggs hatch within the female body and they bring forth the young alinve?

Options

A. Araneus
B. Macrobrachium
C. Buthus
D. Lepisma

Explanation

To solve the question, "In which of the following arthropods do the eggs hatch within the female body and they bring forth the young alive?", we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Types of Reproduction**:
- There are three main types of reproductive strategies in animals:
- **Oviparous**: Animals that lay eggs (e.g., birds).
- **Viviparous**: Animals that give birth to live young (e.g., humans).
- **Ovoviviparous**: Animals that lay eggs, but the eggs hatch inside the female's body, resulting in live birth.

2. **Identify the Options Given**:
- The question provides four options of arthropods. We need to analyze each one to determine their reproductive strategy.

3. **Analyze Each Option**:
- **Option 1: Arrhenius (a genus of spiders)**: This genus does not exhibit ovoviviparity; they are primarily oviparous.
- **Option 2: Macrobrachium (a genus of prawns)**: This genus is also not ovoviviparous; they are typically oviparous.
- **Option 3: Buthus (a genus of scorpions)**: This genus is known for being ovoviviparous, where the eggs hatch inside the female body, and she gives birth to live young.
- **Option 4: (not specified)**: We do not have enough information to analyze this option.

4. **Determine the Correct Answer**:
- Based on the analysis, the only genus that fits the description of hatching eggs within the female body and bringing forth young alive is **Buthus**.

5. **Conclusion**:
- Therefore, the correct answer is **Option 3: Buthus**.