In the diagram A, B, C, D, and E respectively are :
| 1. | Mammary lobe, Mammary alveolus, mammary duct, ampulla, Lactiferous |
| 2. | Mammary alveolus, Mammary lobe, ampulla, mammary duct, Lactiferous |
| 3. | Mammary duct, ampulla, Lactiferous, Mammary lobe, Mammary alveolus |
| 4. | Ampulla, Lactiferous, Mammary lobe, Mammary alveolus, mammary duct |

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