From which embryonic germ layer, central nervous system is developed?

Explanation

**Step-by-Step Solution:**

1. **Identify the Germ Layers**: In embryonic development, there are three primary germ layers: ectoderm, mesoderm, and endoderm.

2. **Understand the Role of Each Germ Layer**:
- **Ectoderm**: This is the outermost layer and is responsible for forming structures such as the skin and the nervous system.
- **Mesoderm**: This is the middle layer that develops into muscles, bones, and the circulatory system.
- **Endoderm**: This is the innermost layer that forms internal organs such as the digestive tract and respiratory system.
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