Match the developmental genes with their corresponding roles:
| Gene | Role |
|---|---|
| A. Nodal | 1. Left-right asymmetry |
| B. Fgf8 | 2. Limb bud initiation |
| C. Wnt3a | 3. Somite formation |
| D. Noggin | 4. Inhibition of BMP signaling |
1
A - 1, B - 2, C - 3, D - 4
2
A - 4, B - 3, C - 1, D - 2
3
A - 3, B - 1, C - 2, D - 4
4
A - 2, B - 4, C - 3, D - 1