Which one of the given responses would be a meaningful order of the following colours? 1. Indigo 2. Red 3. Violet 4. Blue 5. Green 6. Yellow 7. Orange

• 3, 1, 4, 5, 2, 6, 7
• 3, 1, 4, 5, 6, 2, 7
• 1, 5, 6, 7, 3, 4, 2
• 3, 1, 4, 5, 6, 7, 2