To solve this problem, we need to identify the water-soluble pigments found in plant cell vacuoles. Let's analyze each option:$\newline \bullet$Xanthophylls:$\newline$ - Xanthophylls are yellow pigments that belong to the carotenoid group.$\newline$ - They are lipid-soluble and are typically found in chloroplasts, not in vacuoles.$\newline \bullet$Chlorophylls:$\newline$ - Chlorophylls are green pigments essential for photosynthesis.$\newline$ - They are also lipid-soluble and are located in the chloroplasts.$\newline \bullet$Carotenoids:$\newline$ - Carotenoids are pigments that range in color from yellow to red.$\newline$ - Like xanthophylls, they are lipid-soluble and found in chloroplasts.$\newline \bullet$Anthocyanins:$\newline$ - Anthocyanins are pigments that can appear red, purple, or blue depending on the pH.$\newline$ - They are water-soluble and are found in the vacuoles of plant cells.$\newline$Based on the analysis, anthocyanins are the only water-soluble pigments found in plant cell vacuoles.$\newline$Therefore, the correct option is Option 4: Anthocyanins.